[Elecraft] K2 rear panel 12VDC hole size?

[Dave Benham]

I've had a problem with my 12VDC jack at the back of my K2.  Something is
loose inside (not the soldering job) and it causes some intermittency with
the power plug when I'm in the field.  Gary Surrency kindly sent me a new
jack but cautioned me that some of the early K2's (mine is #630) had a
smaller hole in the rear panel and may have caused some interference with
the power plug -- but he didn't mention the size now or before.  My hole is
9mm or about .354".

Could someone out there tell me what the current hole size is?  I may have
to ream mine out during the repair process.  Thanks.

73,
Dave  K8TRF