Store and recall values in abstractions using poly~

Hi all! this is my first post here so be clement please :)

I'm using a poly~ object that switches several algorithm trough a patchername message boxes. Every algorithm has an envelope within it, the value of witch are adjustable in the main patch. Now, every time i change algorithm (read as: every time poly~ open a new patch) the envelope values need to be reset.
How can I store and recall this envelope values (previously settled) switching between algorithms (every time poly~ open a new patch)? pattr or pattrstorage can do the job? If yes I can i use it?

thank you so much
Macs