I had the valves on my FC-470 serviced in June at IBC. Holes were patches and sealant was injected in the tubes. Now I appear to have a leak in either bow or port side. The valves on my port side work well. No [audible] leak matter what position they are in. The valves on the starboard side however need to be in very specific positions marked with permanent marker not to leak. If they are not they will audibly leak. First off, is this normal and to be expected? After rebuild my expectation was that all valves operate like the port side valves. Are the valves hard to rebuild yourself?
There is also a 1" area of exposed fabric on the bow. Could this be the source of the leak? I have yet to spray it with soapy water to check.