This is fascinating to me! The heatgun sounds like a lot of time and labor.
Starbucks is one of the worst! Not only the coffee but they don't even clean their machines often enough. Yuck. I've done some reading and am aware of different storage, brewing and water temperatures but I never thought about roasting my own!
And here I thought I was really treating myself by grinding my own beans on the weekends.
For espresso, I use an old Cuban style stainless steel model, kinda like this
Trickbe: I would love to hear your experience with this and if you find a big taste difference as well.