thanks.
I spoke to Seal's today, and they suggested I could try pushing it up with something; if it's snug, it might be ok til season's end, but if it moves easily, it needs done right away.
I've got the beefed-up brackets, so I don't think they're the problem. I stepped the mast in 10/06, and don't recall how I secured the spreaders, if at all.
I think I'll git-r-done ASAP, now, though.