I did some transfer case work, nothing fancy, but figured I'd post it. My truck has an NP205. I replaced all the seals and gaskets, the e-brake band, ground the rear shift rail for twin stick operation and gave it a quick coat of enamel paint. I ordered a generic gasket and seal kit from ebay, and the brake band from Frontline. My case has a pto and there was only 1 gasket in the kit for that, but I needed 2 (there is a spacer plate.) I ended up reusing an old one that came off nice. All the bearings looked good. The twin stick job was easier than I thought it would be. I used a thread from Pirate for instruction. Just a couple pics from after I got it re-mounted:
Ignore the cotter pin jammed behind the bracket, I just did that until I could make sure the linkage lined up ok.
I made the shifters from flat stock, and some pipe. They pivot on leftover bearings from a dirt bike I sold. I'm holding them in place because the linkage isn't hooked up yet.