It is fiddly to build on
I found I had to take my 0.20mm or 0.25mm (MAX) kanthal:
wrap around the first post twice, tighten down securely
Then wrap the coil around the 2mm rod or mini blue screwdriver - making 3 or 4 turns
Then half wrap the leg under the other screw
So I was building the coil in place - like we used to do on a genny with a mesh wick - the screwdriver is of course solid to build around
Even then the second screw-down can slip off - I think 0.20mm kanthal was slightly easier
Another problem I get i unscrewing the chimney - it binds like a ....**d
On the positive side - it vapes very well when you get the wicking right - and the coil lasts a long time (thankfully)
Personally I think the new Clapton
coils for the Mini Triton / Nautilus are just as good, last as long and are flap free