There are many end-roads to solve the issue. ESV's, Voltwatch's, Home-devised(scratch-built, for you purists), etc... Bottom line is they are all cheaper than a pile of sticks in a monokote shopping sack. Using two test device, say one at home and one at the field is another way to "make d#%*ed sure, you can enjoy flying instead of enjoying building(can you say rekit?).