just wondering what the focus knobs on the gso crayford are made of.. and if they're detachable.
do they attach the same way the r&p knobs attach? and will the plastic knob of the r&p attach to the crayford?
at the moment i'm working on an electronic focuser for the dob.. but just wanna see if i upgrade to the crayford down the track the focuser will be easy to port accross.
el
