Best pencil flame torch head for annealing machine

[dok7mm]

I am having trouble finding a pencil flame torch head that has fine valve adjustments for my BenchSource annealer. I have struggled by for several years with several different heads with practically no consistent adjustment. I am in process of setting up a bulk bottle system with a separate regulator inline before the Y- branch going to the two torch heads. I would like some input from users of rotary machine annealers as to the type and model torch heads they have had best experience with. Thanks