The next step was to re-thread all 140 1/2″ holes. Let me tell you, THAT was a MAJOR pain! The threads were rusted up pretty good, and we had to dig them out and file them out first. Next we threaded them with several different taps – breaking three and a tap holder in the process. By the end of the day, I had a MAJOR blister on my left palm, and there is still peeling skin there a month later – and that was WITH heavy leather gloves that were insulated!