Solaris mods a well calibrated and work always,there are not easy to install mostly because of total dismantle of drone....soldering and drilling is not big deal,it is taking appart and then putting everything together that takes a lot of time(for someone who doesnt do it every day).FCC rulles are simple,device(in this case Anafi) must have signal that does not inerfere with other devices,Must accept interferance from other devices....i would say his mod “doesnt accept” interferance from other devices.....here are some numbers with bebop 2 mod(different drone but similar mod):
At 700m (stock) i had 78db,screen was flickering and few seconds later i lost fpv and control due wifi interferance .
Same spot at 700m with solaris mod signal was 72db,no flickering,no signal loss...at 900m signal was 74db,at that point i was almost past wifi interferance and numbers dropped down,at 1500m signal was 68db.....there is always more range with his mods even if is only few hundred meters,still more than what you can get with stock.....on his ebay page he states that he is stil not sure bout price,699$ for mod and 999$ for shiping and handling is just a joke(he can be funny sometimes)