Seeing your pics of the better boards with snow and Ice still built up between the rail and better board and between the better board and tunnel is my real traction problem. I'd still have to kick the snow and Ice out from between the two, Id like to see some real world testing of the Skins Airframes.
You dont have to kick them! you just slid your foot back to clear them.
remmember he still didn't have his vinyl on the tunnel in those pics.
I have a couple of side by side pics comparing stock vs bb & vinyl.
these were taken after a full day @ RE
Stock
Better boards & vinyl
Here is A 09 w/better boards and no vinyl,pollished tunnel
same day
It is my opinion that even with air frames, You still need to address those gaping holes and bare alumn.
Why not do both, vent & block off