@blade strike - I was just looking at your photos over on RCGroups where you have posted pics of 3D printed supports for trackers but I was intrigued by the quick release prop attachments you guys have been testing.... It looks like the mod screws into the existing two holes on the Inspire motors but does the top hub attachment alter the prop thread? It looks like it slips over the existing thread and makes the bore thicker? Not that easy to see from the pic but would be interested to know exactly how these work (not the mechanics of pushing down and rotating the prop to get it off... I get that bit) but rather the mod to the motor and how it alters the thread. So we all need to get different threaded balancing shafts now after this mod to use our Do-Bro's??? Thanks.