I'll post a few of mine. Been busy in the garden, but it's a bit chilly now.
I don't have any tips though, I've only been making them 2 or 3 years myself.
Hypertufa: (Lightly hit with gold paint. Used a box for a mold and lined it with plastic
first, then aluminum foil kind of crumped up to give some texture. So I was pressing my tufa against the aluminum foil. Made last year but not yet planted. I tried to make the top a scallop look by pressing with my fingers. It's about 5" deep.
