I've recently fitted a new fuel tank to the Fury, and the sender got stuck in a high position. It had been sitting around for circa 10 years and I assume some corrosion built up.

Old fuel sender

I dropped the tank, took it out and gave it a good spray with electrical cleaner (which I should have done before). Before I put it all back together, is there anything else I should do to it so I'm not dropping the tank again in a short while?

Regards,
David

fuel senders commonly have the sender part submerged in the liquid fuel

I replaced mine with a stainless steel disk, with three tubes silver-soldered in (return and two pickups at different heights, to give a reserve). I also cut a hole in the disk, for a separate magnetic float and reed switch sensor - that has nothing exposed to corrode.

I've never seen one sieze. Are you sure it wasnt the float that got caught up on the side of the tank or a baffle?
I've got an access hole in my boot floor (with cover plate) so I can get at the sender without removing the tank. It's awkward but easier than dropping the tank.