I just upgraded my RD3 with the beckett injector. it was very easy. I cut of the hose barb part inside the skimmer and opened the Inside diameter with a small drum sander that fit's in a drill untill the pipe that comes with the injector was a very tight fit. I inserted it into the opening, cut off the pipe even with the flange and stuck on the injector. I also 86'd the rio 3100 and added a Mag 9.5 and holy s^()T its incredable. I know I will have to throttle it down a bit but the foam seems a lot drier and a whole lot more. I'll keep you informed. I definately see a huge difference over the original foam that was produced.
I purchased the injector from Amazon.com under lawn and garden. Cost $9.00, my H/D does not carry them.
------------------
------------------
First it was a hobby, Than an obsession, Now it's an experience.
Come see my tank!