Setting cab on its back okay???

[VA72C10]

I've seen it done on here but always worry about damage. The cab is currently on jack stands mounted to the tire rollers you can roll a vehicle around a shop with. Makes it easy to move around but impossible to clean and paint the underside and fix the cab mounts. Can I safely lay the cab on the concrete floor and do all my cleaning up and painting before re-mounting to the frame? Do I need to brace in the door openings? The rockers are in place already....thanks for any advice. (other than purchasing a tip and flip dolly as that's out of budget )