We don't currently really have support envisioned for multiple HS34's in the same plane if the units are on the same DSAB network. If you want to do it, the only way for sure would be two D10A's or two D100's, each one only connected to one HS34. We might support this better in the future. Also, it matters how you need to hook you radios up. It is possible for one HS34 to have different OBS settings on different radios at the same time, but we'd need to figure out how to make this work from a UI standpoint.
The value knob at the top is almost always used for baro, sometimes used to set bugs, and sometimes used to set the bearing pointers. There isn't much use for two in an airplane. Once the HS34 is out, your baro and bugs will be sync'd between all of your units, so you only need to set them once. Of course, if you need to isolate the networks, this is out the window.
One thing to consider is that the HS34 gives you two additional bearing pointers, so you may not really need two HSI's.
In any case, give us a chance to get this thing up and running with one main source and two bearing pointers working with as many radios as we can before we get really crazy with the connection options
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