Unmodified DJI I attained about 8600 ft FPVLR with amps I attained a little more than 15000 ft FPVLR without amps I attained about 12000 ft DBS without amps I attained a about 10000 I noticed the DBS was more sensitive to antenna direction, but not sensitive enough to be a problem. Also the DBS signal drop off was more linear, with a gradual reduction in bars. The FPVLR system seemed to have all bars and then rapidly, little to no signal. I plan to use the FPVLR since I've already bought it. I think both kits are of a high quality, and are an excellent value. BTW, my expectation is not to fly out at these ranges, but to have a better/more reliable signal at normal ranges. I'm just doing the distance thing to draw a comparison.