This is a breakdown of m_bergman's excellent 100 scale Panzer IV tank. By separating the tracks, hull (main, front, back), it allows you to use minimal support that is easy to remove.
The turret is split also. Lay each piece flat to print.
Support % for the hull and tracks can be pretty low (20%). However, you may want to use a higher % for the turret top (30-35%) to make sure that the barrel solid enough.
You will also want to use support from base on the turret.
If you want, you can print it at .1mm. It looks great.