Thanks for posting your observation regarding the difference that the diablo made.
I do think, though, that some of the confusion on this issue is because of the various methods that diablos are employed on different machines. The facts that some spin & some are fixed & the diablos limited functionality on lock out machines needed to be established before there was any clarity.
I'm not sure the functionality is limited at all, it just works in a different way to accommodate the different operation of the tension head. Mine works great on my lockout.