Coffman,
We maintained the university air squadron aircraft at Burnaston Derby.
They would fly the Havards and Chipmunks in during Autumn and took them back after overhaul in the Spring, moving the delivery crews back and forward in Ansons !
The Chipmunks all had the starters with your namesake !! The re-delivery in spring with a dozen Chipunks trying to start after winter storage was like world war three! The cartridges were great for apprentice experiments! We opened them up took out the cordite and fast burners and used them in all kinds of projects.!