OK - this is the most frustrating activity I've ever attempted :tb-wacky:. Even after being warned to perform this "in a box", there's still one open side, and these little itsy-teeny-weeny parts go flying everywhere! I am now short 2 of the hand-rail standoffs (A-7), as they are somewhere nearby, but unlocateable. Also, the A-3 and A-4 parts are nowhere to be found (weren't on the parts tree when I opened the packet, but then again, this was a used Mikado). Good news - I successfully changed my first couplers (it is a big deal when it is your first conversion), and this little guy is running like a champ. Pulled a consist of UP heavyweight passenger cars, including the old open back-end car, around the layout for quite a while.