Hi
Not to sure about the Abelflex as padding, may be a bit spongy to grip effectively, I know this because I worked for the company who manufacture the stuff until I retired last year and handled the stuff regularly. Though, as it is being compressed equally around the diameter, it may be up to the job, I hope it is.
All said and done, you have done a good job removing the old dovetail set up and fitting the dovetail to a pair of rings, a much more satisfactory arrangement as it keeps the ota away from the mount head by a few centimetres and avoids the chance of scratching the paintwork.
Jeff
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