One on

out button, with the retained by two nuts, which incidentally were odd, and not as Joe Lucas sent i t out. It also eventually dawned on PUB, especially when looking at Frank's photo (RC191, March, p103) that the magneto had probably been fitted with the engine out of the frame, and Frank had almost no chance to access the lower nut and remove the cover in-situ. Lucas listed 'nut, special'for this cover, but did not illustrate them. PUB made up a long nut for the lower location so that an ordinary spanner could obtain access (laboriously filing a round bar to hexagonal).