Yes, you assumed correctly.
It doesn’t affect the focussing zoomed in, the head stops at the LED shelf of the pill, it moves past the copper ring (1.8mm diameter wire).
Planning on adding a bit more, because i like it when you can zoom out as far as possible and have a wide flood.
Speaking of zoomed in and focussing, i replaced the 1mm thick copper DTP MCPCB with a 1.6 mm thick one (Noctigon) so that it does no longer “over-zoom” but stops at focal distance of the lens.
So in all zoomed out has the lens now 1.8 + 0.6 = 2.4 mm closer to the LED than how i bought it.
(changed the switch too, it’s a reverse clicky now, and recessed the boot a bit so it can tailstand better)
I take that as a compliment
As I heated the tube the ends got uneven and I had to trim them down and ended up 4mm short. So I filled the gap with black sugru, that I had left over. It’s the small gap between the rubber o-ring that is sitting in the lower groove and the shrink tube. Not much and it was not supposed to be there, but it all ended up surprisingly well.
Nice work. I might have a go at it myself. You didn’t paint anything, you used shrink tube and sugru? (have no idea what sugru is other than what google tells me).