We have the new baby Seastar system from Teleflex (Baystar) in stock now and is ideal for any outboard up to 150hp. More economically priced yet still built to the same standards as its bigger brother as described here by others with 150+ hp outboards.
We have one fitted to our 720 with a 150 2 stroke on it and it is superbly smooth and responsive with no feed back at all.
Drop me a PM if you want further info.