Estes 24 mm retainer cap dimensions

[terryg]

I am modifying a Estes Canadian Arrow kit into a Wasserfall and am considering using a 24 mm Ester retainer for motor retention. What are the outside dimensions of the cap of the Estes retainer?

 

[sl98]

https://www.rocketryforum.com/threads/lpr-mpr-motor-retention-comparison.138476/

This tread has pics of various retainers with different size body tubes.