Seems to me taht the general consensus is they are not very good. (for lack of better term)
Both of mine are the 800's on excalibur skimmers. I always have to turn the venturri plate or smack the crap out of them to get mine to come back on.
Im still waiting on a email response or a response to my fax, but I dont think it is coming.
We did do the maxijet conversion on one of these and unfortunately the rio (when it worked) did better.