I pretty much only buy single apples when I am planning to use them as a pipe. That is the best way to smoke a bowl. And if you're not a scaredy cat, it becomes a baked apple treat when you're done.
The board is rated for up to 12v10a so 120 watts. Its able to heat up the dynavap to combusting temps in about 10 seconds so I wouldn't doubt its able to melt thin wire in short order. For my purposes it's actually almost too powerful so either need to lower the turns in coil or add a potentiometer on to the circuit
Or get a housing for the unit and a glass slide for the inside of the coil. By the time you do that it will be pretty dialed in. Source: I’ve built a few