Have a search around the forum , i have just fitted a pair of the SX composite tabs on the strength of the feedback i have read .
I have yet to try them so can't comment yet .
I have something like them on my rib. I was told that I could go faster without them on but have not taken them off to try. I would say though that they help me get up on plane faster after watching how they apperate while I take off at 3/4 power. If I had a motor with power trim I don't see the need for them however.
I installed them on a 4.5m rib w/ Yamaha F60 about 3 years ago. Very easy to install, and they did improve the ride a bit, at the expense of top speed.
