Started cutting my gimbal this weekend, but ran out of time when the wife pointed out that I was going to make everyone late if I finished. (She was right, we were just on time). The big trick to cutting ABS with a jigsaw is to keep the blade cool (I used lots of breaks and flowing air). Small trick is to use a straight edge to keep the lines straight (I used clamps and a straight edge). Oh, and I'm placing the piece on two by fours so that both sides of the plastic are supported in order to decrease vibrations while cutting.

So far I was able to cut the 6" square, 3" square, and two 1" squares. Should speed up for the rest of the pieces now that I've got a method going.