Shift shaft seal is usually replaceable from the outside so that won't pose any problem. It helps to put some electrical on te end of the shift shaft before you slide the new seal on so you don't snag the new seal and damage it.
Thanks!This is a great thread! I can't wait to see the final build!
Last night I learned that I can rebuild the YZ shock. By myself. That’s amazing to me. And appeals to my diy attitude.
Why nitrogen vs air?You can use an air compressor and air for the shock but it should be nitrogen. Once you rebuild it you may be able to take it a shop to have it filled with nitrogen for a fee. That is how I would do it but I had a friend that used his air compressor without any issue but I don't recommend it.