Thanks guys. Btys are at the pockets. I'm carrying extra gear which is the issue. Gyro PB. Display.turbine disp. etc. I'm also running futaba bls157 servos and powerbox powerbus..SMK pump...4 tanks. Very much overkill on gear....I'll try the 1800s and get a smaller turbine bty. Changing btys is easy and I usually do every 3 flights. I'm also carrying a 400ma bty for electric brakes. I only have the gear air tank and the GPS sensor in nose but the powerbox is fairly forward..... I'll try Dave's idea with btys. I have 4 x1800ma 2s btys I can use. Should put me on 220 by my test the other day... In a hurry to fly as we are heading to the hot season here when they won't let us fly turbines for fear of grass fires etc...hence my anxious nature here..otherwise it waits to next year or one of our rare Tarmac open days. Thanks again.