Time to tighten up/give your printer a little love.
I built my MK4 from a kit a year ago.
I bagan getting some wobbly results and concluded it was time to take the allen key in hand again and make a pass over all the little bolts and tighten them up, clean and lube the rods, etc. Printing results improved.
This just as a heads-up to owners. A little love from time to time can work miracles.
RE: Time to tighten up/give your printer a little love.
That is what I did in the last few days when I upgraded the Y belt tensioner systems on my MK3S+ and my MK4 with these parts:
https://www.printables.com/model/727247-y-belt-holder-one-piece-mod-for-mk4
https://www.printables.com/model/585494-prusa-mk4-y-axis-belt-tensioner
https://www.printables.com/model/990567-mk3-y-axis-fixed-belt-holder/
https://www.printables.com/model/645676-mk4-y-axis-belt-tensioner-mk3ss
These make adjusting the belt tension much more comfortable.