I finally got to do some testing myself today. I have Tony's boosted kit, REXauv kit with silver leash and Sunhans boosters and a regular DBS02 (not the MAXX). I tried different combinations and had the best with the FPVLR antenna and the Sunhans boosters. I started having video drops at 12,800' and at 13,500' I was told to head back or risk a dead battery. I still had good RC bars and my video never did completely drop out. Same route with FPVLR boosters instead had video flicker at 10,400' and lost connection RTH at 12,900'. I had several video drops and disconnects on the return flight. Next I put the silver leash on the FPV boosters. not sure what went wrong but I started dropping video at a few hundred feet. Never could get things to work. I switched to the Sunhans boosters and went 6,200' to flicker and 7,800' to RTH. Next I hooked the DBS to the SH boosters. Never could get a good video feed and gave up after a hundred feet or so. The only one I tried without boosters is the FPVLR and I made it just about as far as I did with the boosted silver leash. When I got back I noticed one of my prop mounts was starting to get loose so I packed up and came home. At least for now I'm going to settle on the Sunhans boosters, FPVLR antenna, the DBS antenna mount and the REXauv battery holder. All this testing was from one of my hilltops that is fairly open tree-wise. I was a little surprised that the silver did as poor as it did. From my usual flying spot, which is a couple hundred feet+ lower in elevation and much thicker woods, the silver and the FPV are much closer with the FPVLR always winning by 3~400'. Typical flicker happens around 3200-3500 and RTH at just under 4000'.
I like the FPVLR. I like the color scheme of the Tough Leash with the black base and blue coil racks better but I'd rather look at my woods, so Tony's wins. Now if I could just get him to un-ban me on FB like he said he would nearly a week ago and get some instructions on how to install my bird side video booster I'd be all set.