Ya, I was pretty pleased. The photo was grainy and dark and I thought it was a 3"er, which would have still been a good buy, in my opinion, but it being a 5"er I was even happier!
IMO, you have to consider a few things; 1st - Cast iron is a strong, but fairly brittle material when the casting is thin, which is the exactly what the end of a slide is. 2nd - The end of the slide protrudes out the rear of the vise and is oftentimes one of the first things that hits the ground if/when the vise is dropped. Another often seen broken part are the feet of swivel bases or the tabs on solid mount vises - again, then sections that are protruding and, if dropped, are likely to be the first sections to hit the ground. 3rd - Lastly, many of the vises we all like to restore and collect are *old* some of them 100+ years old. They've been used by many generations of people, have probably had numerous owners over the years, and many of the broken ones have probably been abused again and again, eventually, some are just going to break. A person can break just about any tool when they use them incorrectly, so it's not overly surprising to see some that have finally succumbed to the abuse. Really, it's almost *more* surprising (and impressive) when you consider how many still survive intact when you think how the above is probably true for the vast majority of vises out there.
That looks fantastic. Did you use BLO on it to protect it from surface rust?
Chris, I saw and followed that, for a lack of a better term, "argument", and you have nothing to apologize for.