You are correct on the assembly; those "sync" the dual z-axis' together and you did it correctly
nostr:nprofile1qy2hwumn8ghj7un9d3shjtnddaehgu3wwp6kyqpq4cgq353exzmhdsvqjtmw4dq7fvyleuls8umyrvd5umhr4gtx6asqzk33ng SWEET
I am so impressed with myself right now.
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You did a great job.
Congrats🚀