Extruding issue

greg_hartze

I'm new to cad and onshape design and working on a project.  I created a topper for a toy vehicle and did an extrude to remove material to create a window to the right side of the object.  When extruding for the new window, it only extruded the window on the right side of the object and my goal was for it to extrude all the way through to the left side basically mirroring the extrude to both panels and having a window on both sides of the topper.  I'm guessing I did my extrude in the wrong order so I tried rearranging the extrudes but that only caused more issues.  Can anyone explain where I made my mistake? Thank you!

https://cad.onshape.com/documents/6c72151509bf55bca892c298/w/d61628f6b7c2b15dd1f7dc38/e/50fabb025f0026ed29c8939b

bryan_lagrange

Hello Greg,

I would first center you first sketch on the orgin so you can use the mirror feature to mirror the extrude remove to the opposite side.

See below:

https://cad.onshape.com/documents/069a7a8e3338d9d83fa700eb/w/6143f38dcf6ed5a56f2393bd/e/3ca23f5809c6fbff895508ab

greg_hartze

Thank you!  I was messing up by selecting the right extrude instead of the right plane for the mirror. Looks like yours now, Thanks again!