Just a note:
My skis tuned to .7/4 seem to actually be holding their edges longer than my skis at 1/2.
I think it's because of a couple of things. At 1/2, a little dullness has a very large effect, and at ,7/4 I'm using the edge to cut more where with a ski with a less acute edge angle I'd be skidding more dulling them faster in the same conditions.
So I'm calling bunk on the idea they dull faster. In my experience so far it seems to be the reverse.
Dude, your r a fast learner~
I have been saying this on Epic for years!!!