Craftsman 42" mower deck - questions about blade bolt

[KirklandMike]

Thanks to @oldlawnguy and others for the encouragement and noting that newer isn't always better or worth it. Now that I have just completed re-assembling the mower deck and checked out (too rainy to do the whole thing) I had time to reflect. I think it was this forum - years ago - that encouraged me to keep working on my old John Deere self-propelled mower on the basis that the model I had was about the last JD that was worth repairing. I was able to keep it running for a few more years.

I'm gathering that the same situation is true with my Craftsman. So hopefully I can keep it going for a while.

Many thanks
Mike