I have dubbed it the "boatisserie"
My buddy and flattie driver Wild Bill (sgdiv7 to those on the vdrive forums) came up with this slick deal. I think it's ingenious as hell. It's made from standard automotive exhaust pipe. He had the pipe at his disposal since he owns Black Canyon Automotive here in Phoenix. The rod to weld it up cost about $20 and that was it. He actually flipped it by himself. The car lift and straps were merely used as a backup safety device just in case the boatisserie wasn't strong enough, but it worked just fine. Since it's only 1/8" wall pipe you couldn't get up on the thing and put your weight on it, but I'd wager that 1/4" wall would be strong enough to support it, and someone working on it. Once the weight was released onto the boatisserie, it actually turned itself over 1/3 of the way due to the steering gear being on that side of the boat. That's why the (red) pogo stick looking thing is there in the next to the last picture.
Or if you just want to get it off the trailer and flip it........... Flipping it the easy way (http://jetboat.homestead.com/Kidsriding.html)
First the bow setup.
http://jetboat.homestead.com/bow.jpg
Close up of the bow eye attachment.
http://jetboat.homestead.com/boweyeII.jpg
Closer up of the bow eye. Two pipes one inside the other for strength.
http://jetboat.homestead.com/boweye.jpg
Bow from distance.
http://jetboat.homestead.com/bowstand.jpg
Stern shot. Used the cavitation hardware to attach the "t" to. On a jet you could probably use the inside of the pump nozzle?
http://jetboat.homestead.com/cavattach.jpg
Stern from a distance. The boat's weight is completely on the stands in these photos. You can see the yellow nylon strap is just hanging loose under the boat.
http://jetboat.homestead.com/stern.jpg
Boatisserie!
http://jetboat.homestead.com/boatisserie.jpg