On my Creator Pro I upgraded the extruders to the Flexion HT kit......I didn't have a LOT of jam problems, but a friend of mine down at the university recommended this to me. She said that it was a common upgrade option that many Creator Pro owners were doing to help solve the 'jamming' issue.

Not sure if this is something you were considering anyways.....but I find the upgrade was worth it. Problem free for the most part and great prints!

Hope that this helps, if possible.