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Surprise Eggs: 3D Printer Tests
These cute little toys serve as 3D printer torture tests:

Surprise Eggs Obviously, each egg can hold only one of those toys, but I had to run them off in both retina-burn orange PETG and black PETG-CF for comparison.
These Surprise Egg models came from Thingiverse, but they’re also available on Printables. You’ll find many more, of course, at a variety of scales, with these on the small end.
The white eggs print with no difficulty at all, as does most of the equipment contained within:

Surprise Eggs – contents – orange PETG Most moving parts require careful back-and-forth movement to break them free, but they’re surprisingly functional. The PETG-CF, printed with an Extrusion Multiplier = 0.8, looks better, although the moving parts were more firmly stuck together.
Not all of the equipment came out perfectly:

Surprise Eggs – contents on platform Even without any special preparation, the MK4 didn’t have much trouble. If you were doing those for real, you could add stickum to the sheet or switch to a sheet with absurdly high PETG griptivity.
My designs look downright chunky by comparison …