I tried this technique last night with the following modifications that worked wonderfully. For the solvent, I didn't have "dope thinner", and Home Depot only had gallon cans of Acetone. Being a firm believer in less is better, and scrounging, I discovered that the PVC Pipe Cleaner (found in the plumbing section) comes is nice small cans, is inexpensive, and dissolves ABS plastic just fine. Its composed mostly of Acetone, but it also contains MEK, so use in a well ventilated space. Second, coffee "sipper" lids are molded from ABS plastic, so I added a few to the mix since I had thrown many of my scraps out. I'm now "recycling" them from work! They work fine.

Brad