Supportless buildplate for Stealth Press Zero

The Stealth Press Zero is a very fun and minimalistic build. The one thing I didn't really like is the way the stock build plate prints. It takes a lot of cleaning up to make smooth for the washer. This remix modifies the recess to bridge across and to print without supports. The Hole geometry is changed to an octagon so that the solid layers above can recover from bridging as fast as possible.