if you do decide to ringo, make sure that the bridle is placed high up, as otherwise you get lots of spray on the rider, making it an uncomfortable ride, and the tube does not swing out aswell when you turn.
we found this when we had 2 towing eyes on either side of the engine, which was then below the waterline when on the plane, so loads of spray came up! now we fix the bridle really wide up where the moring cleats are, and its much better.
Ebay has some really good deals, such as rage watersports (a shop in gurnsey) which i brought 2 52inch ringo's, 2 tow ropes and bridle for