Just baught a Sanger, has some floor boards in it like you described. They're padded and covered w/ vinel, vynle, vinle?, whatever, and they lift out. I can send pic if ya need one. I'm takin 'em out cuz i like to see the floor, especialy when it's in good shape, one of the first things i look at on a boat, says alot about the condition/quality of the ship. Prolly make some lay in mats for mine