BigFat 4.1 (dual extruder - print size 50cmx50cm x40cm )

hi
this is a BigFat_4.1 3d printer under construction design in sketchup 2018
the 20X20 aluminium profile body
dual directions extruder link https://www.thingiverse.com/thing:2119376
most be very fast
i design that for commercial use but change my mined to share to thingiverse member
thank you