I now able to edit IGES imports. YIPPEE! I’m importing PVC components from McMaster-Carr website. I’m able to drill holes in a 90 degree 1/2" elbow, and slot the ends.
Use McMaster-Carr for the many available CAD files. For example, If you need any kind of FASTENER in your drawing, don’t draw it, it too much work. Let McMaster-Carr provide the CAD file. It’s FREE.
I was a raw newbie in Shapr3D when I made the first post. Sorry for any confusion.