Seeking repairs expertise and experience.......The Alfons Haar SF1 Valve on the keel of my D Class has "failed" (plastic broken internally) and has to be replaced (Sadly a service kit will not do). the very helpful people at Ribstore have sourced the correct Glue, New Valve and Valve Doubler. I now wonder what the best way to proceed is; I can remove old threaded value section without cutting it out leaving the original hole/apeture in the keel (as per photo).
1. Proceed with doubler gluing over existing hole although the area concerned is not ideal or smooth to ensure airtight seal for doubler.
2. Make a slit in keel tube big enough to take new section of valve, work the replacement valve into existing aperture then repair slit in keel, with another patch/
3. Any other ideas.....?
All ideas much appreciated, I am little nervous of this repair, particularly cutting into an otherwise sound tube!