[Elecraft] K2: Holes to the left of Xtals?

[Martin Schmiedel]

Hello,
In the web I found a mod that improves the performance of the cw-filters
in the K2.
The mod suggests to ground the xtals on the left side near the bottom,
while
there is a note in the K2-Manual saying NOT TO USE THE HOLES ON THE LEFT
SIDE OF X7-X11.

Will these holes be needed for later options?

73
Martin

K2 #2706