Check out Unified team diving's alpha hybrid wing, I've had one for years and can't say enough good about it. Does SM and single tank BM.
From website;
UTD Alpha/Delta Trim Device/Wing - For Back-Mount or Side-Mount Diving (upto 37lbs/17kg)
In designing the new Alpha/Delta Trim Device, we set out to create one trim device that can do it all for back-mounting a single tank or side-mounting a single or double tank . Alpha/Delta works in warm or cold water diving environments and fits all hard, soft or travel backplates and side-mount harnesses, Alpha/Delta is truly the only trim device you will ever need. To accomplish this we drew on everything we had learned designing the ground breaking Z and Z+ side-mount systems. What emerged was a versatile trim device that will accommodate almost any type of back-mount single tank diving you do or single tank/double tank side-mounting you will ever do.
The key to it all was a very low profile, streamlined trim device that contours to the body. The Alpha/Delta, with upto 37lbs/17kgs of lift, has a much lower profile than traditional wings. This streamlining produced a trim device that simply will not “taco” or wrap up and around the side of a tank, producing drag. Neither will the Alpha/Delta Trim Device allow gas to roll around the bladder (referred to as “air shifting”
which produces instability in the divers trim.
In designing the Z and Z+ side-mount systems we learned quite a bit about how the positioning of lift effects a divers trim. In previous wing designs, the emphasis was on placing the majority of the lift near the shoulders to achieve proper horizontal trim. The Alpha Trim Device puts the majority of the lift lower on the body, exactly where the diver needs it. This naturally places the diver in a flat, feet up position.
Introducing the Alpha/Delta Back-mount and Side-mount Diving Trim Device. One trim device for all back-mount single tank diving and side-mount diving environments.
Features and Benefits
The Alpha/Delta Trim Device/Wing is designed for back-mount single tank recreational diving or side-mount single or side-mount double tank diving.
Designed for horizontal prone position diving
Easy to dump air from the left or right rear dump vlave (OPV) and from LP hose located on-top of the wing or the bottom of the wing (as desired), even while in the Horizontal prone position
Power inflator and OPV are interchangable from the bottom right side, bottom left side or the top of the trim device. Based on your needs.
Heavy duty cover on wing to protect bladder
1 year warranty on wing
Upto 37lbs / 17 Kg Alpha Trim Device/Wing
Alpha/Delta style trim device for single tank back-mount diving or single tank/double tank side-mount diving.
One wing works for warm water and cold water diving. No need for a 20lbs/9kg wing or a 30lbs/14kg wing or a 40lbs/23kg.
Super Low Profile and Streamline.
Always stays snug to your body. No wing flapping around or "Taco"ing - Significantly Reduces Drag and Dynamic Instability.
Dumps from left OPV and the top mounted LP hose for back-mount or right OPV and bottom mount LP for side-mount
Correct position of the lift cell to keep you in the horizontal prone position - Hence Trim Device.
Inflator/Deflator LP hose and OPV can be moved to the left or right, top or bottom as need be.
Upto 37lbs / 17 kg Lift
Fits any Backplate, Harness, Soft harness.
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For more information, please visit this products webpage.