And I should have added that a pop riveted hook in in the center of each cap to hold a small bungy to keep the caps on the tubes was suggested. However, mine has enough friction between the caps and tubes I don't find a bungy necessary.
Neil and Lynn Holman
Kirk Creek, Big Sur, Ca. coast.
1966 Trade Wind
1971 Buick Centurion convertible
1969 Oldsmobile Ninety Eight