Hi I just recently purchased the Large Model Tech Super Cub 81" and using the EP conversion since I fly nothing but electrics. I find that there is no way to install/change the batteries without removing the entire wing and struts. Does anyone have a solution for this problem. The easiest fix that I can come up with is to not install the front side windows which are large enough to slide batteries in and out and make adjustments etc. I just don't know how it will fly with the windows open. I do know from many hours of flying the real full size super cub many years ago that we frequently flew with the upper and lower doors open to let the air in ( gets hot down here in Ga. in July). Does anyone have any suggestions?