And this here was a major battle.
Getting this thing to seat was a full on fight. Maybe my tank was old, brittle. Heating carefully w/heat gun(not torch), and monitoring with a point and shoot therm. was the trick. An old glove, the heel of my boot, and about 190 degrees f is all it took.
For the first 2 tanks I left my drain plugs in and observed the boat sitting on my carrier. Nothing. No drips, not a drop of water coming from anywhere. After the 2nd ride I pulled the plugs and @ least 1-2 gals. of water came out. I would diagnose this as a high leak( foot buckets, bond line), not much else up there pretty much ruling out low side leaks(pump shoe, grate/ride plate inserts, etc.). Anyone pull/change mats on an FS1? Any insight how these were put together would be great. For now I'm riding it as is and will investigate @ mat replacement. In the mean time I whipped up these: