StephenT; I've been reading your post with Bhouin with great interest. I too am assembling the Funtana 40 w/AXI4120 motor, Jeti70 OPTO, Electron 6 Rx, HS-225mg servos, APC 15x10E prop, and...? for batteries. I see you used a Kokam 5s1p battery this last flight with success. I have been looking at their web site but don't see that particular battery. Is it new or am I missing something? I think I'm leaning toward their batteries, but am waiting for a reply I e-mailed to them with similar questions. I hope I get a better response from them than I got from Thunder Power.......Charlie suggested I contact Horizon.......
