60C = 140F

80C = 176F

100C = 212F (boiling point of water)

i wouldn't imagine you need to go higher than the boiling point of water (at least not for freebase - acetate may be a different story)

but again, i would really want to hear if someone more educated has a more precise estimate.

some kind of dial (akin to a fuel valve on a refillable lighter - that little bottom twisty thing) might be the way to go, so you can manually hone in on the best temperature.  almost like an oven dial of sorts.

i must say, if they are willing to pander to our needs, they might find themselves a loyal group of customers (i am strongly considering, waiting to see how the product turns out)