Greetings, I have two items you to seek help. My skill with Autodesk Fusion 360 is limited at this time. So, I hope you help. 1) I need to know the thickness of a mounting plate for a NEMA23 motor so that a GT3 pulley attached to the motor will have the same clearance as the idler pulley mounted on a 3mm plate on the C-Beam as shown in the attached pic. The diagram is showing a NEMA 23 attached to a plate of unknow thickness. 2) what is the best and strongest attachment for a 40x40 box beam and a C-beam? Your assistance and comments are really appreciated, Have a great new decade! Jim