Model is 45 cm long. Print profiles have been divided by color.
Postprocessing
Remove supports (some parts have pre-modelled supports, some have slicer supports, some combination of both).
Use deburring tool to remove sacrificial bridging inside the holes.
Assembly
See attached assembly guide.
Due to the printer tolerances and nature of FDM printing, sometimes you'll need to apply more strength to assemble, some parts will be little loose and need a glue to secure it in position and whole drive train will need a lubrication in order to make it work smoothly (PTFE lubrication or silicion oil in spray recommended).
I think the black parts are missing from your upload? Or did you use a different color and i'm just not putting 2 and 2 together?
Looks good, already printing on 4 printers!