Thanks for the excellent report. Just what we all needed. Now I believe others will be able to make an informed decision. With regard to the preload adjuster, I kind of guessed that would be the case. If you dont mind sacrificing a bit of aesthetics you might try removing the control knob. I'm betting there is a hexagon shaft beneath the knob and you could then use a regular socket and T bar to adjust.
Hope your wrist gets better soon. Thanks again for your report.