Support the wing on the side where the most mass is.

If you balance a high wing plane upside down, you'll be lucky to get it in that stable point, because the plane will want to swing to a stable position with the mass under the wing. The same will hold for your mid-wing plane. Most of the mass will be above or below the wing, and you will find a stable point with the mass oriented below the wing.

Most likely, that will be with the gear down.

Good luck,
Dave Olson