M48s?!?!
At Knox we had M-48-A-2, etc. I had a bit of a vision problem and the stereoscopic range finders were a challenge. Fortunately, we did the Stakes on the same ranges as we had fired on, so I had memorized the material...:))
We did see the M-60s while we were there and I was especially thankful for the change in ranging equipment. The training during my BOAC was so good that I can still remember details of many of the classes. They set a standard for teaching that no civilian institution ever came close to. Later, I was fortunate to be able to be an Instructor at Fort Knox and to also serve as a member of the Adjunct Faculty at Fort Leavenworth.
I regret that I cannot do it all again...alas!