As i'm also a beginner in 3D-Printing i started to print some additional parts for my printer to learn and get some practice and i want to share my experiences.

The most parts are "easy" to print but bring some mostly optical improvements.
But for the start it's ok.

And there is no changing of extruder, drivers etc, the printer itself will stay "untouched".

I printed all of them (among some others which i declined later) and still using them.

If anything will come in addition i will edit this post....

And yes, there are some simple parts you have to buy, which one can be seen in each individual part page.

1) Optical improvements

• Making the front panel a bit more beautiful with a simple (!) frame
  https://www.thingiverse.com/thing:2758459
• Hide front pulley
  https://www.thingiverse.com/thing:2837666
• Hide rear pulley
  https://www.thingiverse.com/thing:4257026
• Hide rear Y-Axis Stop Switch
  https://www.thingiverse.com/thing:4259051

2) Simple functional improvements

• Z axis Vibration prevention
  https://www.thingiverse.com/thing:4298397
• Voltage Switch Cover (To avoid switching from 220V to 110V which will blow your printer.....)
  https://www.thingiverse.com/thing:2538654
• Hot bed holder
  https://www.thingiverse.com/thing:3573378
• LED Strip Holder
  https://www.thingiverse.com/thing:4597889
• Switch and Connector Box
  https://www.thingiverse.com/thing:4686873

3) Hot End improvements

• Cable Guide (to avoid that the cable get stuck when printing higher parts)
  https://www.thingiverse.com/thing:3703089
• Cable Cover (not only optical nicer but protects the cable and plugs, too)
  https://www.thingiverse.com/thing:2886955
• Hotend LED Cover Fan Duct Half-Circle
  https://www.thingiverse.com/thing:3736680

4) Filament Box (of course Ikea Samla 22L Box ....what else....)

• Spool Holder
  https://www.thingiverse.com/thing:4591211
• Filament Feeder
  https://www.thingiverse.com/thing:3142267
• Thermo & Hygrometer Frame
  https://www.thingiverse.com/thing:2058198
• Ikea Samla Clip (forget the original ones,trust me....)
  https://www.thingiverse.com/thing:2110134
• Silica Gel Box
  https://www.thingiverse.com/thing:3444820

5) Printer Housing

• Ikea Lack Housing
  https://www.thingiverse.com/thing:3156297
  respectively my own make: https://www.thingiverse.com/thing:4726423
• Door Handles and door home found here
  https://www.thingiverse.com/thing:2864118
• Anti Vibration Feet
  https://www.thingiverse.com/thing:3407639
• Filament Guide
  https://www.thingiverse.com/thing:4688173
• Minimalistic Holder for Temperatur and Humidity Display (also included here, as you have to have at least one stl file or similar to publish....)
  https://www.thingiverse.com/thing:4688706

6) OctoPi

• "Moving Camera"
  https://www.thingiverse.com/thing:4681087
• Raspberry Pi Housing
  https://www.thingiverse.com/thing:4691991

Anycubic

All-metal Mega

Doesn't Matter

No

0.2

25%

As mentioned in the text:
you have to place at least one object file in a "thing" to be able to publish it.
Therefore i placed my simliest thing here, too.