I managed to strip the hole that the the flush adaptor goes into on my 2008 DF15. The hole is located in the gear housing and I would love to fix rather than replace the housing as its over $500 for a new one. I tried re-tapping it to 10mm, but that did not work. The hole is too shallow for the tap to get in there and bite. By the time the tap starts to bite, its bottoming out. If anyone has a solution, I am all ears and very grateful for your time.