Basically a similar set-up to other hardshell systems using the Silvretta release:
@solski – typically a RTP or RB that allows the foot to escape easily is used. Many find the Reflex R-style ideal. Wiley, HO Animal, etc.; a number of RBs can be used if not too tight from which to release before the FB does. The Radar "Prime" is a great fitting full RB with a semi-open toe that is easy to release from and doesn't interfere with the release bar.
@Golfguy –with #10 shells running a 12” spread (Reflex R-style), can easily go 11.5” if needed (can feel rear great toe touching release bar hinge through the liner). To have less spread an RTP would be needed. Had to trim the R-style shell to permit the Silvretta release mechanism enough play to get the Edge FB in place; the FB shell is clipped in place before the feet are placed. There is no interference with the release mechanism when testing its function.
The shell’s eyelets (from skate application) come in handy for zip-tying pieces of rubber overlay in place. Hardshells tend to have too much space around the toes so a piece of rubber wrap can be cut to fit inside the shell to fill the void. Also buckles on hardshells can cut through the foam on the liner’s tongue so a 2nd piece of rubber can easily be placed to shield the liner tongue from the center buckle.
The selection of the shell and material used is a good one; it’s nicely compliant along the sides, top of the foot, and ankle. Unlike other hardshell systems in which the forefoot raises up off the plate to the end of the toes, because of the formed plastic cup underneath the sole, pressure on the forefoot is directly transferred to the ski beneath (no more heat gun to flatten the shell's sole!). The plastic cup is 2 pieces, each screwed to the plate (not riveted), so any easy job to replace should they crack (not saying they will).
The combination of the firmly affixed sole to the plate/ski and the relatively compliant shell is really good. Noticeably better is the predictability of tip engagement in the turn (especially onside for me) and a smoother, yet powerful “edge” during acceleration. Obviously I’m kinda excited about this set-up; too bad it’s so freakin cold out!