GT40 Scratch Build Chassis

I am planning a scratch build gt40 MKII build. I was contemplating purchasing some chassis plans from Ebay (See Link Below). Before purchasing them has anyone build a chassis using these plans? If so any reviews or advice? Or does anyone have any better chassis plans recommendations?

Thanks - Jacob
I have looked at those plans also, they are not gt40 it has the shapes but the gt40 is a unibody, there is much info and good advice in this forum, I too am looking to build one from scratch