About this 3D model

=> First Off very IMPORTANT!! <= For a half year now i'm teaching my little brother how to draw in cad. The rendered pictures is his work. I must say nice job! But what do you people think? shell i let him Pass? give it a grade, let me know in the comments! 2 weeks ago i bought my self a new 3d printer. A mini kossel delta to be exact. This is my third 3d printer and i love the freaking thing! Lots of calibration, but prints like a dream. One thing i was disappointed about was the spoolholder. So i designed my own, and works like a charm. I presume that every mini kossel is the same and have the same dimensions. So i did not bother making it adjustable. But if this is not the case please let me know. P.s: Fun fact all the 3d printed parts you see in the rendered picture, is correct orientation to print the parts. Shopping list: 2 x 608ZZ bearings 3 x M5x16 Hexabolts 3 x M5 Nuts 9 x M4x12 Hexabolts 7 x M4 washers 9 x M4 Nuts (or M4 Tnuts) 1 x M8 Rod L=130mm 3 x M8 Washers 3 x M8 Nuts If you have any questions or remarks let me know! And i will try to help as good i can.