Good Morning, all:
I finally got the pellets to work! In case anyone else has the same problem, here's what I did: I reset all the ovens to zero, turned the power to themm off and then back on again, and when I set the sliders, I did the ovens in order, according to how they're numbered on the power grid in the control room.
Now I'm going back and forth between the MYST fireplace and the great tree. Gee, when I got to MYST I thought it would be pretty darn obvious what to do with all those patterns I've been collecting, but I haven't managed to make anything happen yet. Don't tell me, I'm sure I'll get it.
"So then he says it's enough to take aim! What's that supposed to mean?!?"