I cut a whole bunch of tinfoil into "doughnut" shapes. It took five of them to make the perfect right screw down in perfect focus! My job is now done, it's perfect :) I can also feel the focus adapter get much hotter than before, so it's for sure helping out heatsinking :)
Love this laser. Now...
Just after transporting it, the focus is usually off. Same with people touching it when it's turned off, the focus turns super easily so it's easy to throw it off :(
EDIT: Haha, it already had tape on the threads! What I might try doing is cutting a "ring" out of aluminum foil and keep layering...
Just got mine today, it's an absolute MONSTER!!! Such a flawless beam, very pretty colour. This thing weighs a TON, no wonder the duty cycle is so wonderful.
LICK FOR HIGH RES!
Dropped in a pair of king kongs and took it for a test drive outside, during the daytime, SO bright! Glad I got it...