A little more data. I have been using both my TP 5300 Pro-Lites and the Neu 5000 25C packs I used at last years Nats. A Masters pattern uses about 3500 mAh. I set my timer now to 7:10 and that gives me the Masters pattern and a maneuver or two. This is starting the timer after I taxi out, just before take-off, then flying to the timer, setting up and landing, with the taxi back. If I do that it takes about 3900 to 4000 to charge the packs. The Neu motor has been just barely warm to the touch after landing. That is with no baffling in the model. I am borrowing a good scale tomorrow and I'll know what the weight difference will be then. I can pull weight out as the mounting I made to install the unit still uses all my existing bulkheads. If I remove them and start over I will save some weight over the shims and mounts I made to install it now. BTW, the Onas had 5 degrees of right thrust. Seems like a lot, but it was what worked. Taking that all out sure is nice!