Well if I just keep it as a flat sheet of aluminium I will just have it between the bumper and the canards which makes it easy to fit.
If we go with a carbon fibre one that incorporates a lip, than that will be a bit more tricky, but i'm up for the challenge.
My challenge at the moment is to mount it properly to the front bumper. Obviously you can't use a nut on the end of the bolt because you can't access it once the undertray is on. So i'm going to try and use those little c-clip things with a nut built into one side of them (can't for the love of god remember the name of them at the moment. I'm sure you know what I mean).
Sump plug is easy enough, just cut a small sqaure in the drain area (has to be a bit larger due to the angle the oil comes out at).
The rear of it also has a cut out so you can still put a jack under the subframe without denting the undertray.
Brake cooling guides is interesting, didn't think of that. Hmmmm i'll have a look to see what is possible.