3dpBurner Bridge parts for UpMini

This is a remake of the bridge parts of 3dpBurner laser cutter/engraver (by a user demand) . http://www.thingiverse.com/thing:610934

They are 15mm shorter so they can be printed on a UpMini.

For the standard bridges the max object height is up to 50-60mm (depending of your working table thickness ). For these parts the max object height is up to 35-45mm.