I know they changed stuff on the Trackers but on my '76 23 it was just a sheet of 3/4 ply with a single layer of 22oz roving slapped on top - no resin or glass on the back side and no putty to bed it. When I pulled it the wood was heavy and rotten. I was able to just rip the glass out - very poorly bonded to the stringers - I only had to use the grinder for about 5 minutes to clean it up afterwards. Way easier to get out than I expected (good and bad). I replaced it with 3/4 Coosa and even with glass on both sides the new one weighed about 20 lbs less.
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