Ha..I shall answer my own query..he couldn't do it because he had the car up in the air and was trying to do it from underneath. Gotta come in from the top. Happy days.

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1971 W111 280se rhd coupe (The Duchess)
1959 Bristol 406 (Monty)
1970 Volvo Amazon 131 (Lola)
Lives in Cornwall, UK.