@GtE: the compass is supplied with a brass screwdriver included, no issue there.
@GtE: I heard stories of the Grimbergen EBGB aerodrome at one time having a dedicated structure: a wooden base plate with circular wooden "rails", in which glass spheres rolled, supporting a wooden platform big enough to roll an aircraft onto. The plane could thus be rotated through 360° with nothing metallic near. I have a vague memory of having seen the remains, many moons ago.
@fireflybob: ROFL!
Last edited by Jan Olieslagers; 7th Oct 2015 at 19:49.