Steve...
I didn't use anything. The skin rests on the turtledeck which has only a thin layer of clear scuff tape for protection.....no problems so far with this arrangement, and it looks neat and clean too.
Steve,
When I move the canopy lever forward to lock.....it pulls down on the canopy ever so slightly (this happens because the holes in the blocks are drilled on a little bit of an angle) so that there is a little pressure on the skirt.