Printrbot LC and LC PLUS stabilizer

This is a simle stabilizer design for Printrbot LC and LC PLUS ,this litter gadget will make the hole frame much more firm! And also make a mounter for the extruder ,just see the photo.
BOM : print stabilizer 2
M8 screw 350mm 2 (at less 350 mm long longer also OK )
M8 nuts 8
washer for M8 * 8 (optional.)