Has anybody else found that the twist knobs for Beckson ports on Hunter 27s place so much pleasure when fully tightened that they've broken off the base of the port. When this happens you can't fully tighten the knob any longer because it doesn't have anythign to grab against - leaving a poor seal and of course rainwater comes through. Even with a rain-shield port lense, I'm still getting leakage -- I've had to leave a tupperware bowl on the salon beneath the port to catch rainwater. Does anybody have a solution or fix short of spending $90 on a new Beckson port???Thanks