My first set, late summer of 2001, was slabs of mahogany wood that was in the old boat woodshop. Shaped them then pulled them off and used west systems epoxy on them. I recall they were about 1/2-5/8” thick. Very similar to what R&D, 3dr made public at end of 21. Long before the shapes we see today. You can see plastic screwed onto skis on YouTube in 01-02 IJSBA races.
I got the idea after seeing plastic screwed on Chris Lawrence’s SJ. Before that people were adding width to rear! Obviously tear drop worked better than rear lift