Ok, techs, you can help me. On my Dynasty, I have a minor problem. There is a control to operate the neck jets. When pump #2 is on I get high pressure water shooting out from the control. When I first got my tub back in 2003 the same thing happened with the waterfall control and I was told it was the o-ring in this control was pinched. I assume after 7 years this one is not pinched but just failed. Are they hard to remove and replace? Since the only time any pressure is on this control is when pump #2 is on I can easily turn power off, replace and test. Anything I need to know?