Here's where I display my newness. I bought the Spencer a week ago; before that, I had only seen one for real one time (early 1990's, on display at the Log Cabin Shop in Medina, Ohio, for sale for $1300. I had "non-buyer's remorse" for close to two decades and finally bought a Spencer.)
You said "f thre is no square cut-out for cut-off in the lower block it is a replacement block . . . ." What am I looking for to find the square cut-out?
I was trying to figure out how the Stabler cut-off actually facilitates single shot loading, and could not really get it. That may be a clue that the cut out is not there (or evidence of my newness).
Also, I see references to the fact that the magazine follower on the 1865 was improved from the 1860. What is the difference I would look for to confirm which version I have.
Thanks for sharing your wisdom.