"Chip Buchholtz"
Everyone seems to recommend lubricated (waxed) screws

good idea.

Seal end cuts with Anchorseal or equivalent
No finish other than the end cuts

I forgot that. It's important!

Try to buy from a reputable source - I hear that there's a lot of wood
poaching going on with ipe.

There may be some ethical issues with the wood. Rainforests, etc...
I'm not too sure about this.