Jeremy,
I have created a public album in my profile "RF30 mill drill" with various pictures of the pulley guard arrangement from a number of angles, inside and out.
A worthwhile excercise, as I found that I had not been as effective at keeping the metal worm at bay as I thought – the top part of the column had some light surface rust, now cleaned off and oiled. An unheated garage does cause problems with condensation on machinery with temperature changes.
Not so happy to find that the supposedly flexible plastic column cutout cover had gone brittle with age & snapped at the hinge when I opened it. – always something ! Still usable, though, just doesn't hinge any more.
I'll put some dimensioned sketches in the same album when I get them done.
Nigel B.