GREAT NEWS!
For those using real Peltor COMTAC II headsets,
using the Element microphone will solve the impedence problem. So you just have to plug the Element COMTAC II mic on your Peltor COMTAC II instead of the OEM and you're good to go! As Yannos tested, you can receive fine, so that's all you have to do to be fully functionnal.
The supplier I have for the MBITR also stocks Element Comtacs, so maybe I'll be able to source just the Element microphones separately... that' really be great.
NOTE:
This only works for COMTAC II as they have removable microphones that you just have to unplug... For Sordins, COMTAC I and other headsets, you'll be forced to mod them as described there
http://www.airsoftcanada.com/showpos...3&postcount=20