I'm interested in experimenting a bit with "scientific glassblowing". The glass in question is Pyrex. I've made a start with an oxyacetylene torch equipped with a heating tip and the whole clamped in a vise. It works, but it would be fun to have a "real" burner with independent controls for inner and outer flames, surface mixing and other bells & whistles. What would*not* be fun would be parting with the money to buy one. A Bethlehem Great White, for example, goes for something over $2000 new.
Anyone tried making a glassworker's bench burner?