Okie, The stringers are all original. There has only been 3 total owners of this boat and we have all kept it indoors. The motor mount bolts don't move at all and nothing sounds hollow. Anyway I removed the devider under the playpen and installed a 1000 lb fly high triangle sac. It prolly only fills about 600 lbs. Then in the back I removed the ski locker insert and built a brace over the gas tank. In there I put a fly high 650 lb sac. Both sacs are plumbed through a reversable Johnson 12 GPM ultra ballast pump that connects to a through hull in the engine compartment. I had to add a valve to slow the flow to the front sac a little bit. I also have a manuel fill 350 lb sac under the rear bench and a 750lb surf sac that I throw on either side of the dog house.
1989 Supra SunSport | ACME 480 Prop. | 13th Floor Tower