Deep Tuttle to 4-Hole Plate Convertor. The Foil Mount brand item is made to convert your foil to the very popular 4-hole track that is the industry standard. It fits right over your Deep Tuttle foil head in a very tight fashion. (you may even need to sand a little) . The advantage to the 4 hole plate mount is that it both adds fore & aft trimming range and spreads the load over a bigger area on your board.
The width on the Plate is (90mm) which is standard in the industry at this time, however the length spacing of holes in not compatible with all products. Such as the Powerplate (you would need to drill two new holes.