there are many ways to save money in this hobby. advise you hook up with aclub or at least a intrested buddy.field box items can be very basic & still work fine. dont know what the temperature gauge comment on one post was about .these engine CAN over heat, but such item is not really needed. what you should have & many beginers dont seem to want to purchase( after spending hundreds) is a Expanded scale volt meter or ESV. used, they can be had for $5. this device used properly will save you an airplane sooner or later.its essentially a "gas gauge " for your battery pack.otherwise you have NO way to tell if your charge is actually good or not, if you have a bad cell or the pack is weak.