For Microphor toilets, the "regulator" is actually the valve in the water bay (I have one for front and one for back toilets) You close or open the valve to adjust flow/pressure.
Odd, I know!
Oh ok so the way I read and understand what you’re saying is that the regulator or balance in the water at may not need to be fully open. Right now all the valves in the water bay are fully open. I’ll try different adjustments today once my generator/AH exhaust pipes are completed. Thank you I’ll keep you updated on the progress with the toilet. Much appreciated Wanderman