Many years ago i took some old locks that were being replaced at school out of the bin and took them apart to work out the way that skeleton keys, wards etc work. It was pretty logical to understand, next i had to work out how the GMK system worked it was a old school with old locks and they had a fair bit of use. Between the notches on the keys of the 2 two master key systems in the school there was quite a big difference and i could understand that it could only work due to 'slack' in the narrow point of the levers to increase the tolerance.
Anyway ill get to the point now. This 'slack' is not particuly secure, and i know that the Chubb detainer locks can be master keyed. Am i correct in thinking that due to the design of the lock and the 74,000 differs which is a lot for a 5 lever lock( something to do with the pivot point of the levers? ), proportionally, that the amount of slack does not lower the security below a standard 5 lever lock?
I hope that that makes sense, it only just does to me
Mike