Setting custom properties for a newly cloned stack

[Doug Lerner]

What is the best way, timing-wise, to set the custom properties of a newly
cloned stack.

I (stupidly) tried

clone stack "myStack"
set the myProperty of "Copy of myStack" to "123"

But... if in the openStack handler of the cloned stack I need to make
immediate use of that property it seems it is too late. The clone command
opens up the stack *first*, right? Then *after that* the set command runs.

So how to best set custom properties in the cloned stack if they need to be
used during the openStack handler?

Global variables?

doug