It starts life as a PVC toilet bowl ring (trying to keep final costs down for the DIY'er), I machined it out large enough to hold a round orifice plate, the plate will be sealed with an o-ring and held in place with spring loaded fingers (still working this out, should have something by the end of this weekend).
All the end user will have to do is make a hole for this to install over and bolt it fast, access can be via a deck plate or what ever means you want for changing the plates.
Edited By bruce on 1145664375