Just on the question of the orca with mapp cannister - it uses a hose between the two, so you can safely clamp the cannister to the edge of a workbench with a large jubilee clip and run the hose from the top, which isn't heavy at all. It still has the slightly cumbersome feel of any hosed torch, but is much smaller and neater than the Sievert, and the balance is nicer.
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