Update: @vertigo235 set up a Discord server for this issue, if you'd like to discuss/work with people on the problem. Here's the link: https://discord.gg/hYUjSnW This issue has been closed after the overwhelming amount of replies, tests,...
The Prusa Research MK4S we reviewed came fully assembled, except for the spool holder, which needs to be screwed together and mounted. It comes with the full tool kit you would get with the DIY version. You won’t need these right now, but hang on to them for future upgrades. Besides ...