One thing about KBox Mini's... they really were designed specifically for the Subtanks. The 510 connection is very fickle. Some of my toppers work, some do not. I have a Royal Hunter that works. I bought 3 more, about 6 months later. None of those work. So even if you hear that a certain topper works, the one(s) you buy may not. Personally I stopped buying them because I do not want these issues down the road when I have to swap to backup toppers that might not work. I think I've had better luck with my Evic Mini VTC in this way, and it's fairly comparable in size and features (plus TC if you want that) at a fairly comparable price.