DevonDiver
N/A
Even a handful people using a freakin 94lb OMS wing with 200' or so of bungee cord wrapped around it 100 times....
Ah, but think of the benefits.... stranded at sea.... access to helium.... pump her up and fly home instead
For the OP, the clue is in the name:
Single Tank Wing - for single tanks.
Double Tank Wing - for double tanks.
The concept of a hybrid single/double tank wings only exists to dupe the naive... who balk at the costs when entering into technical diving. Inevitably, such a short-term decision ends up costing the diver more money, as they're going to replace the hybrid with dedicated single/double tank wings as soon as they gain enough experience to realize the drawbacks.
I still find it funny that retailers peddle hybrid single/double solutions to unsuspecting divers. I had a student last month who was using a brand-new OMS 60lb bungeed doubles wing with single tank. Wasn't happy... vowed never to patronize the shop that 'recommended' it to her. Short-term, deceptive outlook... money wasted, customer lost...