The threads are not painted. The threads are cut into plastic. We evaluated nylon and metal screws. Nylon is no-go because they are too easy to strip the socket and we'd have to tap the threads first. So we use a self-tapping set-screw.
Since the screw is in plastic, everyone should be clear this is not a tone control for constant adjustment. The simple way to use it is if you want more, or less bass, turn the screw 1/4 rotation on each side and listen to several reference songs across a few genres. When you hear it the way you want it, leave it alone. The threads will handle a number of adjustments, but constant use could wear it out. The hex keys are included in the box and have a warning to this effect on the bag.
It works, it works well, but it's not for fiddling over and over and over.
Version 2 will be = small metal tube with internal thread in which a small screw with plastic end can be used? Problem solved. Can't have something like that and expect people not to use it too much because it will break. That's like admitting to a half ass design. Just my 2c. No disrespect to you Dan. I like your modded HPs very much and waiting for the dust to settle on the AD before jumping in.
For me I will dial in all the bass i can in the morning when my ears are not 100% waken up yet but dial down the bass at nite. so daily use for me potentially.
Edited by koiloco - 9/15/13 at 3:22pm