Cheers dude, would you post up a drawing with the measuremtns when you get it - I'd like to make oe. I suspect the lowertip an do-ring is more critical than thethreaded portin.
I know it's a stale thread, but I thought I'd share my DIY. My damper was F'd, I blew a seal and all the oil leaked into the lowers. Needless to say, I was in a rush and didn't have the time nor patience to order the proper tip. I used a reverb tip and shoved a small O-Ring to the bottom of the threads. I wrapped the reverb tip with soft hockey tape to form a snug fit in the threads and held it tight against the o-ring to form a seal. In the end, it worked fine... a bit messier than the proper tip would have been, but I was able to bleed it.
For $20, I'll probably buy the proper tip before I service the damper again, but in a pinch (or if you're cheap), this worked fine...
If it has, either change the seal for the damper shaft, or upgrade to the NS Dynamics seal head which will seal better, and provide more consistency through the service life and last longer that the og sealing.