Well, I couldn't get it any tighter than it was, because of how it's made. It would take shimming to tighten it.
On the bright side, the boss looks okay, with those machining rings around it still present, so it isn't worn much. The stand on the other hand looks worn as hell and just flops around on it, so realistically I think she needs a new stand.
I discovered an easy way to get the spring back on. Grab the bottom hook about halfway up with a mini vice grip, hook the top on, put a screwdriver through the jaws in the vice grip and with the stand up just lever the bottom hook on with the screwdriver.