I had an earlier thread about water leaking between my powerhead and the adapter plate it sits on. Also I think my water pressure is just a little weak. So I have decided to lift the powerhead and replace the gasket. Someone on this board also suggested it might be the gromet on top of the water tube. Would it be adviseable to check that gromet while I have the powerhead off? If so I think I would have to also remove the powerhead adapter plate. My repair manual doesn't seem to cover removing that plate. Is it a difficult job?