I thought all the above would put you off traditional catches🤣
It has been useful information, both have drawbacks it seems.
I have decided to keep the original Dzus fasteners (hence ordering the Garage56 springs) as I think they suit the car better for my spec (full RAF Shark Green). The vintage ones get in the way of the decals if placed in the correct place and might look odd elsewhere, so will see how I get on - I can always change my mind later but a bit hard to undo drilling holes!

On the existing Dzus front I am looking at some options to reduce the risk of scratching the paint when refitting, maybe some vinyl or film similar to what the newer 3W's have from the factory.