My NIMH RX packs are getting old and I'm thinking of switching to lipos because I already have the HV servos. We run a 2 hour endurance race here at The Nitro Pit and its my favorite race of the year. I need to be able to get 2 hours on a single charge and have my pack not drained. It needs to fit in the Xray RX box, which takes the same size as the 1700 flat pack NIMH. So I am looking to see if its possible, If I cant get 2 hours safely I'll just get new NIMH