Mini 3D printer

I hade same remaining parts from the costruction of my printers so decided to build a little one to test firmwares. The printer has not a control box for this motive. Printing area is 125x138x95higt and is sufficient to have idea if a firmware works correctly before passing it on to the printers I normally use.
It was realized in PLA but later it was necessary to build some parts in dense aluminium because it was too light and moved on the bench, so I realized the base parts with 2 kg of aluminium. The original sketchup file is attached.
For the hot end fan duct I use the customizer of https://www.thingiverse.com/thing:988310 and then modify it to have the fit for the pla fan.
For the radial 50mm fan in the draw I used this thing: https://www.thingiverse.com/thing:1077412, thanks to both designer for the files.
I used 4 nema 17-2A-59Ncm that are wasteful but there was only them in my drawer.
The non printed parts are the 8mm steel rods and the LM8UU, an E3D V6 self made, some alu