The response from Cress Mfg was disappointing to say the least, the rep simply said that he "didn't recognize the kiln". That took no effort to help at all! Even I can see it's a Cress model by looking at pictures online. Poor service from the "Info" guy! So thank you, Neil for directing me to Cress, at least it's a place to start. Now I'm trying to figure out what model it is. I'm thinking C series (similar to C-11-H)? But I'm not finding too much info online, to figure it out for sure. And I'm not coming across any old manuals.
If you know how to pinpoint the model and find a manual, please let me know. Do you think the photo in the link below, for model C-11-H, is close enough to mine, that I can use the same manual?
https://offerup.com/item/detail/3199927
This one looks closer to mine, but the inside dimensions are 16x16x16, whereas mine is 11x11x11, not sure what model it is:
https://www.shoppok.com/redding/a,42,86815,Cress-High-fire-electric-kiln-Cone6----350--Redding-.htm