Why didn't you get a ZEN53, specifically designed for shades?
I believe everything you asked about could be done either with my driver directly, with one of the rule apps built into the hub.
Yes, Parameter 20 and 21, Momentary option, which are exposed with my driver:
https://www.support.getzooz.com/kb/article/805-zen52-double-relay-advanced-settings/
Combine that with an auto-off setting for the max time you want it to run.
