Now I know why 904 was having issues

If you accidentally flip that gear, you are almost guaranteed to have a noisy tranny; so hurry up and put it back together, the same way you found it.

I was so close to mentioning that. :D

Wetting those friction surfaces is a good thing and I always had an old squeeze bottle of fluid on my bench just for that.
Washer surfaces, planet sets and sprags always got a good shot right as they went in.

Not sure what to think about the WD, as it might collect more dust and crap if the parts didn't go right in after.
You'll be fine with the assembly lube and fluid.

Sorry if I'm sticking my nose in where it's not wanted, as I know what it's like to have a bunch of opinions and AJ is totally capable.