This is a replacement peg for your cribbage board when you lose one of the pieces (very annoying). I print it vertically and use some support between the ridges on the thick end of the peg; it probably would print OK without support but I don't know. Its a simple thing that does the job.

MK3

Prusa i3

No

Yes

0.2mm

100%

With PETG, stringing can be a real problem. I finally overcame this by significantly tweaking the retraction settings in Simplify 3D as shown in the screen shot. These settings totally eliminated stringing for me.

I designed this using 123D Design (no longer supported by Autodesk).