*Floater*:
No. But I had the same hope, an AL plate of the same design as the steel plate so it could take the additional weight plates. IMO it would be a killer product, but Tobin didn't the idea.
Floater,
We currently offer 9 back plates, 5 sizes in SS and 4 in Kydex. Having 5 more Aluminum plates, that offer no advantage travel weight and buoyancy characteristics compared to our current Kydex plates makes no practical sense.
We have quite a few users who have a SS plate with weight plates for cold water use at home, and travel with just the SS plate for tropical use. A 8 lbs change in total weighting is pretty typical when switching from a 5 or 7 mil cold water suit to a 3 mil tropical suit. This is even more the case when using steel tanks at home, and AL80's abroad.
Many tropical divers still need some ballast, particualrly with buoyant AL80's. Having this ballast up over their buoyant lungs promotes good trim. It is quite common for divers to use just the SS plate as ballast when diving tropical.
Who then needs a Kydex plate?
If your travel is extremely weight sensitive, the 3+ lbs weight savings of the Kydex plate may be valuable.
If your combination of Exposure suit and tanks requires little or no additional ballast. An example is heavy double steels in warm fresh water. Here the diver may be over weighted by using a SS plate. Keep in mind that the Kydex plate is slightly lighter than a aluminum plate out of the water, but is almost neutral in the water, less than 1 lbs negative.
Is an aluminum plate lighter than Kydex in or out of the water? No it is not.
Does a aluminum plate offer the flexibility of a Kydex plate? No it does not.
Is aluminum subject to corrosion? Yes, and Kydex / Stainless is very corrosion resistant.
I won't say I'll never make aluminum plates, but I just don't see what problem they solve that isn't being addressed by our Kydex plates.
Tobin