A solution (and a question) to storing and recalling lists in pattr

Hello everybody,

I recently encountered this issue when trying to store lists inside a [pattr], and then displaying those values in [flonum]s.
I know I can use [autopattr] and name every single number box, but I thought that for some kinds of parameters (like color and rotatexyz in jit.gl objects, for instance), storing a list would make the [pattrstorage] window tidier and easier to consult.

I tried with [pak], but it gave some problems. So I eventually came to a solution based on [pack] (see patch below)

But I'm still scratching my head about why pak won't make the deal. I think it's related to messages order, but could someone please help me understand?
Thanks,

LSKA