Module Consistency?

[SaLvAgEd]

Just curious how consistent the modules would be if I buy them at different times. Should I be buying these in pairs, for sort of a "matching" process for stereo recording with matched mics? Or, would I get the same results if I buy one N72 now, and another N72 six months from now?

Sorry if this has been asked before...

[tpryan]

There may be changes, but probably not big ones.