My inexperience is really showing here. It seems I don't know much about headsets either. Silly me, I thought you could just buy a headset and plug it into any airplane you're flying in. But no. Bose has apparently developed their own proprietary plug for this thing. It's a round plug with 6 pins inside. Here's a picture:
Now, I can order a receptacle from Bose for about $30 that fits this plug and wire it into my airplane when the time comes:

So far, so good. But what I would really be interested in doing, is to be able to use this headset in other airplanes, too, particularly for all my pilot training coming up soon. Most headsets, from what I'm learning, have dual plugs on the end of the wire. Like this one: I went on the Bose website and found this adapter, for about $50:

Now here's the problem. I called Bose and they told me this will only work on the newer A20 model. It won't work on the X model. It's the same 6-pin plug, so why is that?
Here's what they suggested I order. It's a whole new wire, control module, and microphone, with the dual-plugs on the end of the wire:

Trouble is, they want about $200 for this thing! If I invest another $200 in this used headset, I'm almost at the price of a new A20 model. I don't need a new microphone, control module, or new wire. I just want to adapt it to the dual plugs. Can anyone see why I couldn't wire up an adapter like the $50 adapter above, and make it work with the X headset model? Has anyone done that? The owners manual has all the schematics and wiring diagrams inside. I'm wondering if anyone has any experience, or would be willing to help a guy out here.
I really appreciate any input. Thanks!!