We have a 1990 Vision 32
and our original tank was aluminum and glassed in under the shower seat. We now have a 12 gallon bladder under the STBD swim step locker. This was converted before we bought the boat and before the previous owner bought it (we're the 3rd owner) It seems to work well. The old aluminum tank is still in place, and it would be a bear to remove it, and I haven't heard of anyone who has done that. Our friends later 1990 model Vision 32 is completely different. They have a factory generator, and air. Their generator is under the PORT helm seat, and their batteries, selector switch and some other stuff is under the STBD helm seat. Their holding tank is in the STBD swim step locker. This is all from the factory.