The factory plate had two rubbery blocks with hard plastic shell covers, one over each rubber block. There is a third hard plastic shell cover spanning the distance between the outer ones. It rests on longitudinally scalloped ramps formed in the rubber blocks.
The rubber blocks ride on two Marker toepiece-style shoulder-screws each.
When I 'pinged' the shovel, there was a visible ringing, and a transverse vibration antinode at the www of www.fischerskis.com
i.e., just where the toepiece of a telebinding might go. The marked midpoint is a node.