scho2684 wrote:Yes I have...
There are others for sale as well, a simple aluminium clip screwed at the bottom of the bearing house which hold a micrometer that simply pushes the arm up.
Those things are crap, and what I like about this one is that the pen of the micrometer is fixed in a bearing which sits in the collar so in theory when you unscrew the fixing nut, the arm is still fixed by the lift mechanism which then in theory allow a adjustment on the fly.
I bought one of those crap ones, too, before getting the version talked about in this thread. Not only was the crap one crappy, but on my armboard / TT it wasn't long enough to do the required job.