I've travelled all over the world with a steel BP and a weighted STA. 12lbs.
I also carry two reg sets, two computers, a can light, two backups, Jetfins, a spool or two, an SMB, a drysuit, undergarments, a backup wetsuit, and a bunch of other crap. I can get it all - plus whatever few clothes I may bring on a dive trip - into two under-50lb suitcases. Travel a lot for work so have elite status on several airlines and enough FF-linked credit cards that I never need to pay baggage fees. On United I can bring three 75lb bags anywhere in the world with no charge.
I also carry two reg sets, two computers, a can light, two backups, Jetfins, a spool or two, an SMB, a drysuit, undergarments, a backup wetsuit, and a bunch of other crap. I can get it all - plus whatever few clothes I may bring on a dive trip - into two under-50lb suitcases. Travel a lot for work so have elite status on several airlines and enough FF-linked credit cards that I never need to pay baggage fees. On United I can bring three 75lb bags anywhere in the world with no charge.