This one is a beast to take down to the playfield and shop out. Take your time and take lots of pictures. Screws, posts, washers, etc. should be placed in ziplock bags and labelled for each assembly.
Shopping out a pin is very satisfying though it can be frustrating at times. If you don't have a few extra washers/screws by the time you're done then you haven't done it right!
Good luck! It seems like you got a good deal on a very fun pin!