@PriorityMotif With my Prusa machines, I only modified them to upgrade to the next versions. Prusa has a really nice set up so that when a new version comes out, you can purchase an upgrade kit to bring it up to parity with the latest version using mostly printed parts, or parts from the machine.
My Artillery X2 I had to modify day 1 to make it functional.
The Sovol Zero also needed mods to make it more usable, but they were mostly convenience upgrades for a better spool holder placement.