Howdy everyone. So I finished building my first HT oven a couple days ago, and I got around to giving it its first run from room temperature to 1500F. I was expecting the oven to take anywhere from 30-40 minutes to get up to temp, but I ended up being absolutely blown away when it made it up and past 1500F in just 16 minutes and change. I thought maybe it was a fluke, so I left it for a couple hours with the door open so it came back down to room temperature and gave it another go to 1500F. This time it was a staggering 13 minutes up to temp, and just to make sure I wasn't getting a bad readout off the thermocouple I threw a bit of 01 tool steel I had lying around in for about 8-10 minutes or so, and when I brought it out sure enough it was non-magnetic (Not a perfect test I know, but decent enough). My inside dimensions on the oven is about 18" long, 7" wide and 6" tall. From what I've read online, this seems really really fast to get up to 1500F. I'd love to hear some other thoughts from people with more experience than me (Is it safe to heat up that fast, maybe something I did wrong?). And in the meantime I'll work on getting some pictures of the oven, and a video timing the oven getting to 1500F! Thanks in advance everyone!