Like grasshoppers soon everyone will have one Brian you make it sound simple but there is like Woody would testify so many things needed to make one of these in deep sympathy Brian dropping tiny things they can travel to weird places in a workshop. I do believe a mate of mine in the 1950,s a Jeweller had the game sewn up with a large tethered piece of leather under the bench front to catch the bits but then he was catching gold and silver who wouldnt.
An interesting thought when collecting these precious tools everyone should extend themselves by reciprocating in some way dont go empty handed remember what goes around comes around.
Kind regards Peter.