@ddw_music So [list] creates "gpointer_copy" errors from the Pd binary (use log debug mode to see).
And an abstraction will not accept gem_state messages travelling back up the chain as an external can do.
The gem_state will need to be looped like this........ iteration.zip
It's simple and I think it's safe.
David.

@whale-av I see, recursion is the only way, then. zexy is probably easier to explain to the students.

Thanks!

hjh