Yes, I'm already on the Win10 Insiders Program, and have been since last Sept. with Build 9841.
That's a good idea about switching Fast Ring off and Slow Ring on, and then back to Fast Ring. I haven't tried that yet. I'm just finishing another Build with 10041 on my Win10 test machine. I've found a few glitches that slowed me down.
Glitches are:
(1) Soon as you install Google Toolbar alongside Chrome, it DISABLES your IE11/Spartan browser; locks it up hard.
(2) You can NOT go into SAFE MODE via MSCONFIG.EXE for a diagnostic boot! This was not the case in previous Builds 9926-->bacl to 9841. SAFE MODE works in all of those. This is a potential big problem for me, as...