[Elecraft] Heil PR-781 and K4

[Ron at Signs by Ron]

Hello all,
I'm looking for feedback from anyone using a Heil PR-781 microphone with a K4.  It's not on Heil website's "Elecraft compatible" list, however,  HRO's catalog does list Elecraft in the list of "elite" class radios for which the PR-781 is designed.  I also saw a Youtube video of a K4 operator using a PR-781 and seemingly having a great experience.
Thanks in advance.
Ron, W1TK
P.S. I'm currently using a Yaesu MD-1 which seems to work great.  As I re-design my shack though, I'm going to have a second mic and boom for the K4. The MD-1 will remain connected to my Yaesu radios.