Hey Todd...
I know your question is regards to my Rev's and not the ones Perry is buying (Rev 85's) ....I purchased the 105's in the 181 length. .....and here was my path.
Over the years I've found for me, the way I ski, what and where I ski, ( height 5'7", weight 148lbs) and more typically on Austrian made skis, I need to be more forward than the factory mounting.
So, when I had my Marker Scizo's mounted to the Rev 105's, I had them mounted at plus 1 to begin with. The Scizo binding allows plus and minus 3 centimeters. Next...head for the mountain,
With trusty screwdriver in pocket, I went out and started skiing the ski with all different turn shapes and speeds. If I found I had to apply to excessive forward pressure to engage the shovels (my shins taking a beating) I'd move the binding forward usually a few mm....little steps. If I find the tails start to wash out....I'm to far forward. This has paid off in positive results on snow.....My Rev 105s are spot on balanced for me in all the conditions to date I have had them in. Skied them with Mike at Holimont in 7" or so of pow and crud....carve, float they felt perfect.
Hope this helps....G