The plane balances just ahead of the cg without the gear and battery so I decided to mount the battery a bit further aft than recommended. A 1/8 balsa tray and velcro strap fit perfectly in the open bay just behind the wing. I added decals and am now just waiting on the gear to arrive. I doubt if I will need much if any tail weight. The weight is now 5lb 1.5oz and I have 2.5oz in landing gear and a switch to add...maybe 4.5oz total.