I have a german beomaster 7000 that I wish to convert to 110v. The repair manual shows changing taps on the transformer will make it work. Is that all there is to it?

Yes.
Though, it may also need to have it's mains fuse(s) changed to suit the new voltage (and current).
Halfing the voltage means doubling the current.

Martin

Thanks. I successfully completed the conversion! It took about 15 minutes of soldering.