That is interesting because it does save lots of cash. Castle Creations recommended getting the larger speed control when you use higher lithium cell counts. This motor setup will only draw 45 amps, but at 6s that is the limit for the speed controller you want to up from the pheonix 45 to the 60. I am done working on the jet now in my current house until I move into the new house, this is very frustrating because the jet is near completion. It still should be flying by the end of the month.