so I’ve recently picked up a couple a Fisher as-100, and a Scott 222b and a Scott 299c. Reading up on bringing these up to full power slowly with my variac per Thatch Ear’s recommendations in the sticky here on tube audio. One of his recommended steps is flipping the amp upside down and putting my amps in the oven to bake it. I’m having some reservations about this. My oven only goes down to 170. Is that too hot? Should I do it? If I do it, how long should it stay in???