Mistakes were made... Unipolar 3D printer part 15

Get a last minute Christmas deal on prototyping PCBs and 3D printing at: https://www.pcbway.com/ !
Time to dish the dirt on my $50 DIY 3D printer! Some of the corners I cut to stay true to my promise of a printer that cheap were a bit too much I guess... I'll call this the final installment of phase 1 of this project, the next 2-3 parts will be dedicated to making the printer spit out decent parts, hopefully at a much more rapid pace than the rest of my videos have been so far. Many of the issues discussed here I've been aware of for a while, but decided against talking about it in the respective videos as it would have made them much longer, so I dedicated a full video to it instead.

The untested 90° duct for 4010 radial blower fans on my thingiverse just in case someone can use it (though it might not be good): https://www.thingiverse.com/thing:639...
And the duct by "unwohlpol" I ended up using: https://www.thingiverse.com/thing:404...

Here's some affiliate links* to parts I got for this printer:
5pcs A4988 stepper motor drivers: https://s.click.aliexpress.com/e/_Apv00b
Cheapy hotend kit: https://s.click.aliexpress.com/e/_A217Gn
Arduino mega 2560: https://s.click.aliexpress.com/e/_AnxG2B
Geeetech PLA filament: https://s.click.aliexpress.com/e/_DBW...
4010 turbine fan: https://s.click.aliexpress.com/e/_AnUid9
100k NTC temperature sensor for heated bed: https://s.click.aliexpress.com/e/_A9cOwJ
10m nylon coated fishing line: https://s.click.aliexpress.com/e/_9HKabt
Keep in mind I got a few of these items during sale, so the total might well be above $50 now (especially with inflation)

And link to the proper POM bearings I bought for my laser engraver:
https://s.click.aliexpress.com/e/_DCA...

if you decide to purchase something through an affiliate link I may receive a small commission at no additional cost to you :)
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