I only have a Scgrick fitted to a very standard set up, for now. But it certainly wants to go earlier in the rev range and well worth it. Good luck with finding one, you just need to be quick. I shall keep a look out for you.
Don't be put off by missing parts as the can be worked around. I have a digital shift controller that switches the flap over and is quite cool as you can set the rpm and see what it us at. All works fine