Congratulations! You’ve mastered the basics of printing and are looking at improving your machine for better prints and a better printing experience. You’ve come farther than most and deserve a drink. Cheers.
The Essential Upgrades
PEI is an excellent surface for printing with PLA+. So good in fact we decided to make our own print beds! They offer an increase in bed adhesion compared to the glass print bed and they are removable without throwing off your bed level. Get 2 or 3 to keep your printer running 24/7.
Filament is hygroscopic and if left exposed to the air, it will absorb ambient moisture from it. A food dehydrator will suck all that collected moisture out of your filament and keep it in prime shape whenever you’re ready to use it. I usually toss a spool in the night before I install it on the printer. Just makes things a little more consistent and easy. Go cheap no more than $50 should take care of you. For PLA+ I usually cook it for 5 to 6 hrs at 55c.
Tertiary Upgrades: Quality of life for printing enthusiasts
If you decide to get into more exotic nylons like Zytel and print at much higher temperatures than PLA you’re going to need an all-metal hot end. Micro Swiss is the best you’re going to get. It’s not all that expensive. Don’t screw around with anything cheaper. They’re not worth your time.
And that’s it. You have a well-tuned and exceptional printer now. You can print anything your heart desires. Why not learn the other side and make custom CAD? Getting Started 5: Learn To CAD