The makeup selector switch was the culprit for the MUT that would only build on the bottom deck, and it was a coincidence that the one I swapped from another tower also only allowed building on the bottom deck. I got a replacement and now it works great.
One more question, I found a piece of tape under the MUT that said "greased 2/93" what exactly do you think was greased the shaft bearing? Is that something that should be done more that once a decade? What kind of maintennance do you guys give your MUTS?
Thanks, Mike
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