I've got a touring setup with a pair of skis at 76 mm underfoot, skins cut to fit.
I've also got a nice pair of 80 mm-width (and two cm longer) skis mounted for alpine, which I'm tempted to switch over to touring.
But the skins I have for the 76 mm's are practically new, so don't want to have to buy a new pair.
Is the 4mm "skin gap" noticeable? A problem? To be avoided?