Andy,
For what it's worth, when we bought Sea Wyche, I was keen to lift the keel out because it was rusty at the bottom, where grounding had rubbed the paint off. However, it was spring and I wanted to go sailing, so I left it. I subsequently inspected it using a mask and snorkel and found the paint to be in pretty good condition. Therefore, the condition of the bottom part doesn't necessarily indicate the condition of the rest of the keel. And the bottom part can be re-painted on the trailer, with the keel in situ.
Sea Wyche's mooring is her trailer, though; if Jago has been kept afloat with her keel down, it will presumably need to be antifouled.
The alternative to paying a yard to lift the keel out is to have the boat propped up with the keel down, like a fin-keeler, or to have her held in the slings while you antifoul the keel - easier, though you won't be able to access the top of the keel inside the box, should you want to.
As for the lifting eyes, they're bedded in sealant to stop water getting to the threads. Mine were pristine when I removed them. (They are easy to remove with the keel in situ, sitting on blocks to lift it as high as possible. I used a 10mm Allen key through the eyes to turn them, worked by a socket on an extension.) They might have been the originals, though I don't know. I'll renew them anyway because the eyes themselves are somewhat rusty and worn.
Your boat's situation might differ but I thought I'd mention these things in case you too don't need to worry about refurbishing the keel in a hurry.
I like Gary's dual-purpose lift/gantry, though - I think I'll get one for next year.
Anthony Russell
235/02 Sea Wyche
Anthony Russell
235/02 Sea Wyche