I have an AR 1300 Junior 1972 and I attempting to restore the interior. My work is focused now on the gear shift and I am finding many pieces under the dirty carpet. First, from the top, a gaiter, similar to that from ClassicAlfa (IN046), then a rubber boot similar to that from Mr Fiat (part number 10055-305) which is attached with a tightening ring to a black metal dome which covers a further rubber boot similar to that from Mr Fiat (part number 10055-306), not attached to anything, just floating, then a larger rubber boot similar Mr Fiat (part number AR-SP-456) which is attached to the gear box with a tightening ring. Seems an awful lot of different boots etc. What is necessary?