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@DoktorSpoor
That is a truly beautiful project and I get the models too, I always make a model to get my 'brain round' an idea. Brazing with Acetylene/oxy is wonderful and one of my favourite processes, but I have had to switch to propane recently, you can do it as brazing is more about the volume of heat rather than the very high temp focused flame acet was designed for. An air blown torch with propane as fuel works well and you can use compressor as well, don't know what you have over there but the most common ones in uk are Flamefast. Very interested to follow your experiments, silver flows easy with air blown propane but I would guess it's only useful with lugged builds? I've used TIG to braze bronze, it does not flow as well as a flame, may be worth a go. Again an inspirational bike, sir!