It all went back together this afternoon just fine. Since I am not dying it for a while, and I don't want to lose anything in the mean time, I put it all back together. The best advice i can give when taking these things apart is to take your time. Heat also helps to loosen up plastic parts.

I've never had a repair break before (or have another crack near it), but it's the same procedure to repair it again. I don't use bondo or body filler on plastic repairs to repair them. It's not meant to stick parts back together and hold them. Adhesives make the repair and body filler will smooth it all out if needed. Sticking body filler to a dash is nothing new. People have been doing it for years, but there is a lot more that goes into it than just throwing it on the dash and smoothing it. In order to make it last, you have to prep it and add other composite materials to hold the shape. The body filler just makes a smooth surface.