I don't have the Marco, but before I read your post, that is exactly what I would do. You will always have a battery installed but don't have to always have the Marco installed. Interested to see what others think.
Proud owner of the Mavic Air and having a blast trying to figure out all it's capabilities. As a retired AF Pilot, it surprises me that so many areas are prohibited from flying UAS's; State Parks, National Parks, etc. etc.