[lincpimp]

I have the same concern with my savage flm conversion. I plan to make a partial tray out of delrin to protect the ends and open side, and keep the pack in place. I will also use some velcro straps to hold the battery in the box.

I had a good look at the spacers and decided not to use them. They look ok, but I do not trust that they will keep the battery off the spur gear.