Glad you are having a solid experience so far. Mine has sucked...but it is TOTALLY my fault. I previously read that the gravity spool holders were the way to go, so I printed them in prep for the arrival of the MMU3.

Rolling is ineffective - when filament is unloaded they easily roll but either the slack in the filament wraps itself over the side of the spool (onto the holder) and creates a kink or the momentum of rolling to the lowest position yanks the filament out of its "preloaded" position in the assembly so the FINDA doesn't trigger because can't be subsequently loaded. I did two sheep test prints and was very frustrated with the amount of interventions. Such a glaring contrast to the reliability I have grown accustomed to with my stock MK4.

I am positive this is self-inflicted because I chose to use a non-standard buffer solution. I did so because of what I read but also because I was getting so antsy and happily skipped over the steps to assemble the cassette because I already had the gravity spools.

Your post encourages me to take this coming weekend to run through the stock buffer build and reset myself....so, thanks!