Thanks for your help.

Dave, Thanks a lot for your help , how do I reverse the faces inside the hole ?

Thanks again.

Hi there, Im a total beginner and will need some assistance with sketchup 8 , I created half of a sphere and extruded the bottom of it to create a cylinder with round top.

after that I tried to punch a thru hole on the top of that solid by drawing a cylinder and intersecting the common surface , then deleting the part that was sticking out. I assumed that this would create a solid but I gues I was wrong.

Hope that makes sense,

How would I make a solid manifold out of that for 3d printing ? See attached.

Thanks ,

Veetek,

sss.skp