I have an '89 20' SF and the keel on mine is straight as well. Haven't checked the upper panels but will do so tomorrow. The build quality on mine is good but definitely a bit lighter on the glass than the Potter builds that I have. The transom on mine is solid as well so it looks like Tracker did a decent job in this area. I did have soft spots in the floor at all the console and leaning post fasteners. They used balsa core in the floor, plywood squares in the hatches and access panel on mine. The plywood was rotted and water logged on mine. The Seacraft ride is still there though
