sans a new chassis and custom driveshafts, I see few other options for your proposed layout. But I personally hate mounting components on anything other than flat on the chassis and that goes fr the Rx as well. An alternative location, if you have a micro Rx like the spectrums, is in between the battery and the rear driveshaft. I assume you'll be using 5 Ah enerland cells so you'll find the battery cannot go that far forward. The weight will be screwed up if you choose a shorter taller pack pushed forward too much. I just converted a very similar truggy and can send you a pic.