[Elecraft] [K3 or K3s] Filter Alignment

[Amateur Radio Operator N5GE]

I have two K3's and a K3s and I'd like to remedy 
the folowing situation if it's posible.

When using Sub along with split I'v noticed that the U shaped markers
don't align in the center of the the DX country.  They are shifted a
bit to the left of the Marker on both the Main and Sub reveivers.

Is there a procedure for bringing all of the centers to the same
location in relation to the same place (center?) of the of the
Filters?

Thanks,

Tom,

I have been up to see the
Congress and they do not
seem to be able to do
anything except to eat
peanuts and chew tobacco,
while my army is starving.

Robert E. Lee