Man, I've been staring blankly at this computer screen for the last 3 minutes thinking "huh?"
What kind of epic story have you got that goes along with an MTX39 not being a stout enough wheel? I know what kind of epic stories my MTX has survived and been plenty stout enough for, and most of those tales would never be believed by those not present at the time.
I have not used a Mavic double track, but my Monster bike uses Weinmann 65 (not the Origin8 version). One of them went under the wheel of the truck that ran me over, and is still in use.