[Jim Holden]

Lead:

Spin the spinner on by hand, lower the car onto the ground and give it a whack or two.

(Of course right is left and left is right when tightening, the theory being that the action of the wheel going forward will tend to tighten the spinner),

Then fasten safety wire to the spoke of the wheel that depending on the side of the car will cause the wire to tighten should the spinner begin to loosen.

I drill all three ears of the spinner so that when the spinner is tightened you can pick the ear that has the best spacing to a spoke of the wheel.

...and of course you will use a safety wire pliers to make the connection.

Drive for a while and check the spinners. (A test whack or two)

Also always use antiseize. You haven't lived until you've tried to get a galled alumnium spinner off a steel hub.

Happy trails!

Jim

PS: ...and as to being slightly neurotic: At the GT40 reunion at Watkins Glen in 1989, Fran "t-shirt" Kress had a rear spinner come off his original GT40 "at speed". The spinner flew off and hit the car and then as he spun, he watched one of his rear tires pass him. Fortunately, other than the "ding" in the chassis from the spinner, no major damage was done (although, reportedly, Franny had to visit the men's room for a change of underwear).