Hi Brian,
Where did you get the arms I was looking to modify a transmitter mitt for the X9E and a set of these would be just the ticket.
Would also be interested to know how you attached them to the X9E, although I don't have an issue with the current ones, but did have to change the strap, the clips were just too small with cold fingers on top of a hill with snow coming at me
If JRI reads this he'll probably link to this video: