Switching wings and STA is something I do fairly often... single tank wing + STA for a single tank and doubles wing for doubles.
In a 3/2 full suit, a SS plate and AL80 tank I wouldn't need any weight in salt water, adding the hooded vest I would probably need a couple lbs so I would just go with a weight belt -- low cost, low risk of failure, packs very well, and easy to source if you forget it at home and you're on a trip. There are plenty of pocket options, too
Are you going to go on the Coz invasion in a couple months?
In a 3/2 full suit, a SS plate and AL80 tank I wouldn't need any weight in salt water, adding the hooded vest I would probably need a couple lbs so I would just go with a weight belt -- low cost, low risk of failure, packs very well, and easy to source if you forget it at home and you're on a trip. There are plenty of pocket options, too
Are you going to go on the Coz invasion in a couple months?