Print two parts in one file but at different print speed

[Kellan 0]

I'm trying to print three cylinders at different speeds to test some plastic. My question is, can I put them all in one file and have it print each at a different speed? e.g. print the first layer of cylinder #1 at 40mm/s, print the first layer of cylinder #2 at 50mm/s, print the third layer of cylinder #3 at 60mm/s, print the second layer of cylinder #1 at 40mm/s, print the second layer of cylinder #2 at 50mm/s etc. Or would I need to create 3 gcode files and somehow combine them?

[Dim3nsioneer 558]

Speeds are per-object settings so you should be able to have 3 objects built at the same time with different speeds.