Can these stand up to 50/50 resort/backcountry? I am only 145lbs and on a set of volkl katanas. I'm using Marker Barons with BD factors right now but the bindings are damn heavy...

So, would these stand up to 50/50 or should I look at the marker F12s to lighten my setup?

dynadukes: google it. it's a plate which allows you to hot-swap your dukes(or baron's i think) and your dynafits. alternatively, i think you can probably use a bunch of quiver killers to drill out two sets of holes and just hot swap in that fashion. anything with moving parts will fail eventually (tho the dukes and dynafits will probably not fail before you do). anyway saving the dynafits for days when you actually need them might get you some extra longevity out of them, and the dukes probably just feel better in bounds.

You can use them at the resorts... but they are much more of a touring binding. I will occasionally take mine to a resort, but ski cautiously on them as they aren't really meant for the abuse of skiing moguls or hucking cliffs. For resort skiing, I like a binding with a lot of Return to Center (RTC) as the speeds and conditions at resorts tend to create more vibrations, which alpine bindings handle well. Dynafits are more linear - you are either in them, or out. There is not a lot of elasticity to them, especially in the toe piece.

Easily....

The TLT Vertical FT Z12 was not designed for inbound use. They can absolutely "stand up to it". They are bomb proof bindings, and perform as expected, over and over. They will perform well inbounds or out. However, I believe it is not recommended to ski dynafits inbounds at a resort. I also believe that would be the answer you would get from backcountry.com. I have skied these inbounds many times and have had no problems (outside if toe icing). I do however prefer to use a more traditional alpine binding while at a resort. I would imagine people's opinions my be split on if Dynafits should be used inbounds or not. I have hear they are popular inbounds in Europe.