Yeah!
You should put cone packs on every shelf till you get temps figured out. 567's top to bottom. Preferably by the peeps so you can shut the kiln down according to cones until you know which schedule actually reaches cone 6. Then you'll know if you over fired that clay or underfired anything. Find the cool/hot spots.
8 hours is a little short, but how long did you bisque? That clay wants to go slow from around cone 4 to cone 6. If you can program a slower 60F/hr ramp at the end, that will help. It will enjoy a cooler shelves too, which, usually is the bottom unless you have a downdraft vent. So it was probably just fired too fast.
Did you kiln wash your shelves? I redid some yesterday.
Got UV goggles for peeping?
I rolled a bunch of sand into a cone 10 clay so it doesn't shrink a lot and keep it ready to plug these into. Keeping about 3-4 firings worth dry.
Firing without cones is like doing bonsai with no water!
Put em in the peeps!
Lol...at the woodfire loading, I just got everyone randomly yelling "conepacks", so they didn't forget them. Just be the creepy dude in the yard yelling to yourself!
I recently had something deleted here..https://community.ceramicartsdaily.org/
Just something about sitting someone on a bonedry steeple of clay left on the wheel and spinning them blah blah...so they're not AS cool as here ....but great folks and help! Lol though, someone quoted what I said and that is still visible! Hahahaha! I found Mihai's kiln build there!
Sorce