I went to the link you posted & realized it is your model 
From looking at all the files, you should be able to do it on 3 plates.
What if you replace the brown cat with the cushion.
If you add the brown cat & the bed, you might be able to do it in 2 plates.
Yess, itās my model 
you like it?
That seems to work, with only mm to spare! But I would love to have the cat on its own plate since the cusion and basket are āoptionalā, the main event is the cat itself.
@JonRaymond then that may be the only solution. Have Printables users have a slightly bigger model.
Still, frustrating that it is so locked down with huge global margins. But if there is no other way this will be the route I might take since it is a lot more convenient for the average BambuLab user to just have one plate with three colors without the filament waste. Thanks for thinking along, still hoping Bambu Studio becomes a tad more intelligent!
Iāve found that Orca Slicer is more forgiving in this matter. Some arrangement that Bambu Studio doesnāt allow, but it works and prints fine in Orca Slicer.
BTW, I havenāt confirmed it yet. But Iāve noticed Bambu Studio and Orca Slicer slice model differently even every settings are the same. If fitting is important, you should double check the Preview when using Orca Slicer.
Iām pretty sure you can print from a gcode file. It would be tedious, but possible, to get the gcode for each item, placed one by one on the build plate in the location you want (in Orca, or studio), then splice the code together. Most likely a python or other script could accomplish that. Initially, you would need to run the complete code through a simulator, to make sure that part way through, the head does not decide to go where you donāt want it too, crashing into objects on the way. I canā t remember if cura gives a user more control over positioning. I raised the issue with support, when I first had the printer, sent diagrams of how many certain sized objects could be safely placed, compared to how they would allow them to be placed, explained what they need to change, etc. They showed no interest. The safe area around the nozzle, is not a circle, since the nozzle is not in the centre of the print head (xy) but it makes the software trivial if you assume that, which is what they have done.
