Buddy of mine has a new drop controller, you may have one of his drop in replacements, the Gerbil. Now he has the super gerbil, kick starter is going on now. Great board, here is a video of a mill conversion he did, but it works with lasers as well (X,Y,Z and Rotary capable)
If you have any questions, feel free to ask. I have a direct line to Paul, so answers will come from the horses mouth!