indoor quadcopter

Hey everyone — I've been shooting a lot of indoor manufacturing content lately and running into drift issues with my drone. I understand GPS is unavailable indoors and the vision positioning system has real limitations, so I'm not chasing a hardware fix — I'm looking for operational strategies...

A little about me: I am a newb to the field imo. I have flown an indoor standard heli, one of the $20-30 units with counter-rotating blades. I have flown an indoor/outdoor quadcopter and wrecked and rebuilt it to only a little success. I have a fairly small house, but I have decent an open air...