Well I did a distance test with the antenna modification and started at 50yrds started the tank and tried all the functions. The kept adding 5 yrds to the distance with clear line of sight and repeated the sequence again. I Kept adding 5 yrds to the tests and stopped at 100yrds and everything still functioned. I figured at 100 yrds is ample distance because the tank would be hard to see if it was camo'ed and not on concrete but grass or sand terrain . I am satisfied this mod will work for any distance I plan to run it