That does look very nice indeed, like it came from the factory like that. I'm making a L2Pro myself
Here but it looks very amatureish in comparison.
I went for a motor low on one side and my battery on a tray. Yours has more room for cells, perfect balance, better cell cooling and it looks like by droping the cells into the chassis instead of raising it up to the mud guards you may have a lower CG despite the high motor.
edit: to tidy up the link.