2slow2matter,

I did secure the battery pack in the hatch. If you used the same fuel tank as PICTURED on the plan there is room to place cross brace supports to hold the battery pack in place under the fuel tank. Also you may want to consider using two blind nuts on the firewall to hold the nose wheel bracket in place. The kit gives you two wood screws. If you have a few hard landings you could rip the wood screws out. Then you have a dilemma on how to hold the bracket in place with two big holes where the screws used to be. It sounds like you are already passed that stage though. So it may be too late to change it. I also changed the hatch to a solid piece of plywood instead of the one provided in the kit. It just seemed like it would last longer. I use an 1100 Mh battery pack since I am driving so many servos (6) I did not want to run low on battery. I tend to fly 3-4 flights in a day.

Sledge_78