Just tried to video the spark (so much for the need for sparkproof torches etc) but it doesn't show up too well, despite being able to see it with the mark 1 quite nicely.
However I did discover something not normally noticed, in that when you connect/disconnect the nipple/locking device there is some 'wiggly amp clicky business' going on around the base of the collective area. (awaiting correct technical terminology)
