Rough day here too @tronaton, broke the brushless build's frame after 30s of pack one, couldn't fly the kk100 (bad config), with a fixed config it flew horribly with zero range, built a smart100 brushed, crashed gently 20s into battery one and killed the FC's built in RX.
Maybe the above should be in the in the broken stuff thread.
I was happy with that one for the 20s it lived.
(Did fix the RX bits, took a heat gun set to 1500f to that end of the board and cooked it till the antenna fell off)
Anyway, decided to completely start over again, used a new FC, a new frsky XM RX (with mis-cut antenna, need to fix that), the 8.0x16mm motors I got thinking they were 8520, and some 65mm props.
First up the weight pics with afunta 55mm. 600mAh tattu battery.
Then with the 65mm props. There's a measured 3.1mm tip to tip there, not a lot of room.
It made it 5 packs before I tagged a wire (I'd been playing around them, I deserved it) and got the instant-static-fpv-feed of an Issue.
Definitely destroyed the dipole antenna, may have pulled a wire off the vtx, not sure.
Other than that it's fine, only fell 17' or so into nice soft grass.
Oh and one or more props ate the RX antenna, too. Tasty.