diff --git a/core/src/net/sf/openrocket/database/motor/MotorDatabase.java b/core/src/net/sf/openrocket/database/motor/MotorDatabase.java
index 231027104..9f7dca35e 100644
--- a/core/src/net/sf/openrocket/database/motor/MotorDatabase.java
+++ b/core/src/net/sf/openrocket/database/motor/MotorDatabase.java
@@ -17,10 +17,7 @@ public interface MotorDatabase {
 	 * @param length		the length, or NaN.
 	 * @return				a list of all the matching motors.
 	 */
-	public List<? extends Motor> findMotors(Motor.Type type,
+	public List<? extends Motor> findMotors(String digest, Motor.Type type,
 			String manufacturer, String designation, double diameter,
 			double length);
-			
-	public Motor findMotor(String digest);
-	
 }
diff --git a/core/src/net/sf/openrocket/database/motor/ThrustCurveMotorSetDatabase.java b/core/src/net/sf/openrocket/database/motor/ThrustCurveMotorSetDatabase.java
index 5c3d4b7a4..d04aea975 100644
--- a/core/src/net/sf/openrocket/database/motor/ThrustCurveMotorSetDatabase.java
+++ b/core/src/net/sf/openrocket/database/motor/ThrustCurveMotorSetDatabase.java
@@ -4,6 +4,9 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import net.sf.openrocket.motor.Motor;
 import net.sf.openrocket.motor.ThrustCurveMotor;
 
@@ -14,51 +17,59 @@ import net.sf.openrocket.motor.ThrustCurveMotor;
  * @author Sampo Niskanen <sampo.niskanen@iki.fi>
  */
 public class ThrustCurveMotorSetDatabase implements MotorDatabase {
+	private static final Logger log = LoggerFactory.getLogger(ThrustCurveMotorSetDatabase.class);
 	
 	private final List<ThrustCurveMotorSet> motorSets = new ArrayList<ThrustCurveMotorSet>();
 	
 	@Override
-	public ThrustCurveMotor findMotor(String digest) {
-		if (digest == null) {
-			return null;
-		}
-		for (ThrustCurveMotorSet set : motorSets) {
-			for (ThrustCurveMotor m : set.getMotors()) {
-				if (digest.equals(m.getDigest())) {
-					return m;
-				}
-			}
-		}
-		
-		return null;
-		
-	}
-	
-	@Override
-	public List<ThrustCurveMotor> findMotors(Motor.Type type, String manufacturer, String designation,
+	public List<ThrustCurveMotor> findMotors(String digest, Motor.Type type, String manufacturer, String designation,
 			double diameter, double length) {
-		ArrayList<ThrustCurveMotor> results = new ArrayList<ThrustCurveMotor>();
-		
+		ArrayList<ThrustCurveMotor> fullMatches = new ArrayList<ThrustCurveMotor>();
+		ArrayList<ThrustCurveMotor> digestMatches = new ArrayList<ThrustCurveMotor>();
+		ArrayList<ThrustCurveMotor> descriptionMatches = new ArrayList<ThrustCurveMotor>();
+
+		// Apply filters to see if we can find any motors that match the given criteria.  We'll return
+		// the most restrictive nonempty list we find, or empty list if no matches at all
 		for (ThrustCurveMotorSet set : motorSets) {
 			for (ThrustCurveMotor m : set.getMotors()) {
-				boolean match = true;
+				boolean matchDescription = true;
+				boolean matchDigest = true;
+
+				// unlike the description, digest must be present in search criteria to get a match
+				if (digest == null || digest != m.getDigest())
+					matchDigest = false;
+
+				// match description
 				if (type != null && type != set.getType())
-					match = false;
+					matchDescription = false;
 				else if (manufacturer != null && !m.getManufacturer().matches(manufacturer))
-					match = false;
+					matchDescription = false;
 				else if (designation != null && !designation.equalsIgnoreCase(m.getDesignation()))
-					match = false;
+					matchDescription = false;
 				else if (!Double.isNaN(diameter) && (Math.abs(diameter - m.getDiameter()) > 0.005))
-					match = false;
+					matchDescription = false;
 				else if (!Double.isNaN(length) && (Math.abs(length - m.getLength()) > 0.005))
-					match = false;
-					
-				if (match)
-					results.add(m);
+					matchDescription = false;
+
+				if (matchDigest)
+					digestMatches.add(m);
+
+				if (matchDescription)
+					descriptionMatches.add(m);
+
+				if (matchDigest && matchDescription)
+					fullMatches.add(m);
 			}
 		}
 		
-		return results;
+		if (!fullMatches.isEmpty())
+			return fullMatches;
+
+		if (!digestMatches.isEmpty())
+			return digestMatches;
+
+		return descriptionMatches;
+
 	}
 	
 	
diff --git a/core/src/net/sf/openrocket/file/DatabaseMotorFinder.java b/core/src/net/sf/openrocket/file/DatabaseMotorFinder.java
index a92e9f8e1..36e83698d 100644
--- a/core/src/net/sf/openrocket/file/DatabaseMotorFinder.java
+++ b/core/src/net/sf/openrocket/file/DatabaseMotorFinder.java
@@ -3,6 +3,9 @@ package net.sf.openrocket.file;
 import java.util.Collections;
 import java.util.List;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import net.sf.openrocket.aerodynamics.Warning;
 import net.sf.openrocket.aerodynamics.WarningSet;
 import net.sf.openrocket.motor.Motor;
@@ -16,6 +19,7 @@ import net.sf.openrocket.startup.Application;
  * @author Sampo Niskanen <sampo.niskanen@iki.fi>
  */
 public class DatabaseMotorFinder implements MotorFinder {
+	private static final Logger log = LoggerFactory.getLogger(DatabaseMotorFinder.class);
 	
 	/**
 	 * Do something when a missing motor is found.
@@ -40,6 +44,8 @@ public class DatabaseMotorFinder implements MotorFinder {
 	
 	@Override
 	public Motor findMotor(Type type, String manufacturer, String designation, double diameter, double length, String digest, WarningSet warnings) {
+
+		log.debug("type " + type + ", manufacturer " + manufacturer + ", designation " + designation + ", diameter " +  diameter + ", length " + length + ", digest " +  digest + ", warnings " +  warnings);
 		
 		if (designation == null) {
 			warnings.add(Warning.fromString("No motor specified, ignoring."));
@@ -48,14 +54,7 @@ public class DatabaseMotorFinder implements MotorFinder {
 		
 		List<? extends Motor> motors;
 		
-		{
-			Motor m = Application.getMotorSetDatabase().findMotor(digest);
-			if (m != null) {
-				motors = Collections.<Motor> singletonList(m);
-			} else {
-				motors = Application.getMotorSetDatabase().findMotors(type, manufacturer, designation, diameter, length);
-			}
-		}
+		motors = Application.getMotorSetDatabase().findMotors(digest, type, manufacturer, designation, diameter, length);
 		
 		// No motors
 		if (motors.size() == 0) {
@@ -65,6 +64,9 @@ public class DatabaseMotorFinder implements MotorFinder {
 		// One motor
 		if (motors.size() == 1) {
 			Motor m = motors.get(0);
+			
+			log.debug("motor is " + m.getDesignation());
+
 			if (digest != null && !digest.equals(m.getDigest())) {
 				String str = "Motor with designation '" + designation + "'";
 				if (manufacturer != null)