Piper 1 3D Printer version 3 upgrade

This is an optional US Piper 1.3 upgrade parts for Piper 1.2 3d Printer https://www.thingiverse.com/thing:2966295
This set upgrades linear motion on X and Y to standard linear rods 8 or 12 mm.
This upgrade may be applied to Piper 1.1 and Piper 1.2. PTFE Z slider is experimental and not tested addition (Similar design was tested on Piper 2.2 https://www.thingiverse.com/thing:3294998 but not on Piper 1)

For sizes up to 300x300, you may use 8mm rods 500mm length with LMU8 bushings. For larger