Your £50 Bernzomatic is significantly less capable than this -
https://gasproducts.co.uk/gas-blow-t...torch-kit.html (I have both...)
Up-front cost of gas will be higher, but the run time on the little cylinders is quite low, so it'll recoup fast.
Later, you can add more nozzles for different work. There's no need to go over to MAPP for melting small amounts of silver - air/propane is more than enough, although boxing in the heat is a worthwhile move.
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