I have a choice of a 13x36 1980's Cincinnati hydrashift with low use, or a 1960's 13x40 Harrison, either one for $3500. The Harrison is super tight and precise, but parts come from England. I hear good and bad about the Cinci and parts are expensive, but I like that it's newer and US made. Which is better for precise gunsmithing, threading, durability, maintanence, etc?