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A few months ago, I decided to laminate all three pieces in Kevlar and carbon fiber. I had previously done the same on the outside pieces, but the bottom leading edge eventually wore threw. On the new pieces, I made what looks like a horse shoe for the bottom leading edge out of 1/8” sheet aluminum, and fastened it with low profile sidewalk bolts. I’d post a picture if I could figure out how to post with a iPhone. In any case, this “horse shoe” has been holding up extremely well. I suspect you could use this horse shoe approach without laminating the pieces with carbon fiber and it would fend off 99% of the wear.
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