Trimming
Foot rings, chattering, and getting the weight out.
The foot makes the pot
Trimming is where a thrown form becomes a finished one — the foot ring, the weight, the line where the clay ends.
What to cut
foot a clean ring, even height wall even thickness, bottom to rim weight the difference you can feel chatter controlled, or none at all
Why it matters
A heavy bottom is the most common beginner tell. Trimming is how you lose it.