I wish you every success. These are a sensational addition to any darkroom. I probably made more enlargements over my life time on 138 & 138 S enlargers than any other device — they were ubiquitous in commercial operations for decades. Most would have been scrapped 10 years or more ago as the evil of 0s & 1s spread its menacing tentacles.
Others well worth investigation might be DeVerre and Kamm
Keen to hear how you get on.
"Photography was not a bastard left by science on the doorstep of art, but a legitimate child of the Western pictorial tradition." —Robert Galassi