Ignorance on my part with segments. Created 2 circles and divide in half, set segments to 18 and exploded them then deleted the outer most 2 to create 160 degree arcs. Used the endpoints to make new arcs and deleted the exploded ones. (I found it much easier later to just make the arc first and rotate it, I'm learning) Then created an arc on each side of those to join them. I didn't see a way to integrate them into one closed line. In the future should I create arcs and circles with less than 1 segment per degree? That is just what I chose because it rendered better. Thanks for the suggestion on scaling more. Will try that when I get back to the computer. (It is already scaled up from 90mm) I used solid tools => Subtract. Didn't know it wasn't supposed to be there.

Newbie here and I am pulling what little hair I have out trying to figure out how to remove a circular cross section from a complex solid. I browsed the forum and found that I needed to scale up my components. The subtract worked fine with just a pipe and a cylinder intersecting it once scaled up, but with the more complex shape there are 2 arced faces that disappear after the subtract. Any help on what I need to do to either put the faces back or what to do to keep them from disappearing in the first place would be appreciated. 2013 Make. Thanks

Before Subtract.skp