I took the challenge of printing the gyro designed for soluble support with single extrusion, see if I could get a similar result with much less print time than dual extrusion.
Printed with complete support interface of line pattern.
Took me a couple of hours to clean the supports and broke a few arms that needs glue back together.
It rotates smoothly at the end. And the bottom finish is not bad.
But still, it's too much work and risk to clean the supports. Not recommended to print with single extrusion.