I have used one on my RV-7A for the last 6 years with zero issues. It is made of delrin. Can't remember where I purchased it. Only drawback is using the original rudder stops with a hole drilled in it to "pin" the rudder for a gust lock. I use an in the cockpit gustlock so it has not been an issue for me.
TMX-IO-360w/ P-Mags, Hartzell CS Prop, Slider,
Dual Garmin G3X Touch w/ GTN-650
2017 Dues Paid!