I love the original shell, but because it goes in after the pods the wires of my receiver touch the shell and push it out slightly. That's my only complaint. I had no problem really fitting my SP GT and futaba 2.4 gear in there even used the mounting plate for easy removal.
Undertray would be greatly received, although I've stopped crying now everytime I see it belly something hard and abrasive
This shell also gives a bit more real estate for stickers hehe