[Elecraft] K3 Encoder Knob installation?

[Brian F. Wruble]

Hi all,

For reasons unknown, one of the small encoder knobs (E980088 for the high
cut filter on the front panel of my K3) broke.  Elecraft very kindly sent a
few spares.  I checked the manual for installation instructions.  They are
just supposed to be pushed on --- lining up the flat part of the shaft with
the flat part of the inside of the knob.

For whatever reason, i cannot get the replacement knobs to go on --- or at
least I am afraid of damaging the encoder because of the force needed.  All
of the replacements they sent look the same, all look right.  The
replacement is sitting about 3/8" higher (further from the panel) than the
others.

Any advice?  73 de Brian W3BW

*Brian F. Wruble, C.F.A.