About this 3D model
This is exactly the same Laser Cut Build Platform designed by Beardface for 8x8 inch heated bed (http://www.thingiverse.com/thing:17717) but converted to PDF and rotated & centered to fit A3 paper in landscape if you want to print it and use as a template. Beardface states that this is for Printrbot+ but I will be using it on my Printrbot original with wider spaced bases and an 8 inch heat bed (as seen on the earlier Printrbot build videos by Brook Drumm on YouTube http://www.youtube.com/watch?v=6swI8Mer_yw&list=PLDEB12F986EC83054 ). To widen a Printrbot original to accomodate this build platform you will need to fit 4x threaded rods on the bases that are 305mm long and X-axis smooth rods that are 332mm long. Full metric BOM for Printrbot original to suit this build platform is here: https://docs.google.com/spreadsheet/ccc?key=0AqAQZ3EWh53GdHc3dlNzZFZwNU1KbWJGdlNRX2RCcEE#gid=0 You may also want to print a couple of feet to improve stability when using the larger build platform, something like http://www.thingiverse.com/thing:36269 or http://www.thingiverse.com/thing:23889 Suggested thickness and material for this thing is 6mm Beech Ply. All credits to Beardface for the original design.