Is there any difference or does the fire cause any difference to brass between flame annealing and induction annealing or is it just a source of heat to work the soften the brass? Reason I ask is the cost of machines between the top induction annealer from the kiwi's (lots of R&D and very easy to use but you have to buy a lot of piolets) or the propane annealers that are out there on the market. And then there is always the home made one. Not that I need the best. Just curious. Personal opinion is the induction would be the most consistent.