Gerry-

Could you upload some pics of this so I am clear on what seems to be happening?

That'd help in understanding the description, as Tony is right about the sizing of the tail-pieces: the Micro will work in a the Medium or Large tail pieces, with the larger receptacle, but it won't be as secure of a fit as it will be in either the Micro or Micro-Medium tail pieces where the receptacle on top is perfectly designed for it.

But if this is something different, related to the W-pattern attachment to the transmitter body that uses the three tiny undercut posts that are machined in to the bottom of the case to capture the tiny gauge spring, that'd be something new and we'd definitely want to see what's going on.

Thanks,
RB