I don't know how, but somehow managed to over extrude a solid for making a hole and ended up with a hole where it wasn't suppose to be ( bangs head on desk ). See attached model with arrow

It took me a while to figure out how to patch the hole as I couldn't figure out a way to use the Boolean tools .

My method :
highlight the inside circular hole edge line , draw lines on or across edge line and use the trim command to break the circle into segments , I made 5, select the 5 segments and use network command . Repeat for the outside hole edge.

Highlight the whole solid model , select separate .

Highlight the inside surface and adjacent networked hole patch , join the two to make one surface, Repeat for outside hole.

Select all model surfaces and make solid

To me that seems like a lot of steps . Am I missing something ? Is there an easier way to file a hole in a solid ?