[R-390] Cosmos PTO

[mfisch at kent.edu]

Hi:

I know there is a lot about the Cosmos PTO out there, but nerves have
got the best of me.  I want to adjust the end point (out by about 1 kHz)
and I took off the screw to adjust the end point, but the end point
adjustment screw looks like a spanner nut with a rubber center.  Do I
just take a 1/8 inch blade screwdriver and have ho or is there something
I need to be careful of?  I was expecting a slot and it looks like I
should stone a screwdriver to have parallel sides.  Is this the case?
Thanks in advance.

Mike