GoMog also has an article saying much the same. A word of caution the splines get razor sharp so don't touch them.
http://www.gomog.com/allmorgan25.htmlE. Tighten Spinners
While car is still on jacks, drive the knock-off spinners up tight. If using 2-eared or 3-eared knock-off spinners, use lead hammer provided. Octagon spinners should be driven up using wrench and lead hammer. Wrench tightening alone is not sufficient.
F.Test
Spin wheels by hand to make sure there is no rubbing against brake calipers. Also, rock wheel assembly to verify that the knock-off cap has seated completely in the wheel. No looseness should be noticeable.
G. Retighten Spinners
Lower the car and hammer the spinners until they will not move with even the hardest blow of the hammer. After the car has been run 25 miles, be sure to re-check the knock-off spinners for tightness. The wheels seat themselves on the adapters after the initial run-in and knock-off spinners can be tightened further.
THIS IS IMPORTANT. Knock-off spinners must be very tight to prevent wear. Continue to tighten knock-off spinners every 100 miles for the first 500 miles. Then check tightness every few weeks. WIRE WHEELS should always be checked for tightness of the knock-off spinners regularly.
Webmaster note: Considering the torque involved here. I strongly suggest you carefully clean and regrease the splines on the adapter, the splines in the rim hub and the threads of the spinner itself EACH time you remove them. A bit of dirt in there can lead to seizing.
