Hey all.
I learned about a technique called spin or friction welding. It's where you're supposed to put a straight rod of styrene in your Dremel chuck, turn it on and you should be able to run it along a seam, fucing the halves together. I used it with a good deal of success but when I tried it again, it just burned a hole straight through the model.
Could be that the sprue that I was using was old or the formulation was off or something?