Have watched this thread with trepidation. My Centa unit installed 16,550 miles ago has failed. I am getting a horrible metal to metal knocking from it which tells me that the neoprene barrels have given up the ghost. This happened quite quickly from being well behaved to totally obnoxious, as in one day.

I have gotten the ball rolling with my dealer but parts will have to be ordered and time scheduled.

This could eat up the rest of summer!

What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.