How do you make your focusing rings ?

[sesam]

I made mine with a press-to-fit

Is it better to make 9*0.5 treads?

i used this in my first bild. http://laserpointerforums.com/f51/my-first-build-using-lathe-my-misstakes-72370.html

 

[DrSid]

I think threads are better, since then the focus adapter acts like heatsink for the optics. They do get hot too .. and it would have better contact. But this seems fine too.