I am slowly rebuilding a ball catch Mk3 Meteor, bought as spares last year. Bearing in mind that it is 50+ years old so may have worn and is just the assembled barrel and cylinder, the lock up feels weaker and it is much easier to break open.
It won't be as well engineered as the Feinwerkbau and this was obviously a short lived experiment which BSA must have revoked for a good reason.
Still looking for a stock for it.
The more I think I know, the more I realise the less I know.
My Express doesn't suffer droop.
The ball catch works just as it does on many Dianas
The breach adjusts so as to set the jaws for drag.
The only minor issue is the Chinese failure to use a shim under breach seal.
That can cause a consistency issue
I use the shim from a Diana model 34 and a BS109 O ring and it's sorted
Replacement breach seals are then pennies in a choice of 3 hardness types.