If you're pulling the ECM out just to do chip changes, I might have a suggestion for you...
Caspers sells a PROM relocation cable. Basically, it's a 3-foot ribbon cable that plugs into your PROM socket, and has a recepticle socket for your PROM chip. My ECM is sitting happily in the kick panel, and the PROM now resides in the glove box. To change chips, I just open the glove box door.
Hope that helps.