nostr:npub19sdzmtpggrjt7mm0egnx4ck0694hsc3cqx4jgyuav4mcqcl9ztjs63u6lg That's a good question - Trying to join the end result does not go well. I think joining the strips before turning it into filament is the best way, but I have not yet tried that.
In general, I rely on a filament sensor or simply attending to the printer. Alternatively, in the slicer, you can get an estimate of the weight of the filament used on a color swap, and space color swaps to use most of a line of filament. All techniques come with caveats.
As far as not drinking soda, we ask