Then came the two-piece battery tray, including the spacer to offset it from the chassis (to clear the dirt guard) and the actual tray:
Open, demonstrating the ability to adjust for different battery lengths:

Showing the height adjustment capability:

With the top strap in place (notice the outer velcro on the height adjustment strap, more on that soon):

My favorite part, showing how the length adjustment strap actually helps secure the top strap!

Another complete view:
Complete "nude" view:
Overall CG view:
Cool:
Just over 8lbs fully RTR!