Looks good. I only have one thing to point out. Since you are running a lipo that is shorter than the tray, why not split your foam spacer in half and put some of it in the front. That will help cushion the lipo cells when landing a jump, or during a crash. Most lipos do not have much protection on the ends, and a hard landing could shift the cells in the pack, or damage them.
I hope My 8ight buggy looks that good when I am done...
