Hi I just finished my X6, pics later today I hope, I e-mailed chazz on how I fit my GTB, I think he liked it since he put it on his site.
http://www.2wdrc.com/tech_GTB.htm
Also made some room for lexan shields for the underside of the tranmission. Since I do NOT want to see tranny internals, like a diff gear, on a finished car. Other than that, everything went well together.