Here's a gallery of my build. Nothing much to explain, just sawed off the chassis to a point and drilled, attached the GT2/B4 front end, and reversed the back-end so the wishbones are swept forward.
Still to do: Run rods from the rear top plate to the GT2 sub-chassis, drill and attach servo mounts, and sort out a means of retaining the saddles next to the motor - atm, I'm thinking of heat-moulding some lexan (a bottle) into a battery tray, and reinforcing with fibre tape.
Concerns: The rear of the chassis could bottom out on a very nose-up landing, and there's quite a bit of side-to-side flex (may or may not be a good thing).