Thank you, Charlie.
I'm sure they sent that document with mine. I should've dug it out and read it. I wonder about me, sometimes.
I gather that the six screws stay in their same holes and the arm position is infinitely adjustable by rotation, retained by friction. That's great - just what I need.
All I need now is some fine safety wire...
Hop-Along Aerodrome (12VA)
RV-6A - N30YD - Built '98 / sold '20
RV-10 - N130YD reserved - under construction
donating monthly to the VAF - thanks, Doug