@sdmitch said: No but I have sent it to you by PM. Got it. It's awesome. Thanks! It's exactly what I had in mind. I'm going to put this to good use.

The issue is that edges = entities.add_edges [[30,0,10], [50,0,10], [50,0,30], [30,0,30], [30,0,10]] doesn't weld the start and end point. Therefore there are two vertices at the same 3d point that isn't welded. add_face(edges) require the edges to form a closed loop - the edges you have in this case just looks to be closed. It's unexpected, I agree, but changing the behaviour now might break existing extensions. But any reason for first creating edges and then creating the face from the edges instead of just creating the face with the points directly?

Here is one solution using DC A cubic with two DC holes (cut2, includes the rim) As for scaling, one requires the insert point to be on the outside otherwise to hard to calculate, therefore place the surround with toggle to inner (smaller) size, place and scale to suit opening then use interact finger to toggle to outer. Cheers Philip PS another method using four cubic components, would be to join them without worrying about hidden lines/ faces. But to incorporate a outer shell/ explosion at some point when happy with the object created. Then one can use "cutlist" or other for material takeoff, as shown in some of my other posts. one can swap the childless component with its original if one need to amend it at some later point. Frame Surround.skp

Thanks for the info. I got to play with the pro version for 8 hours when I installed SU earlier this week, but I spent it learning dynamic components. Those are really awesome, but I only use SU for personal work, and can't quite justify the $600 for the pro version. (Especially since Autodesk Inventor is only like $700.)

@mwm5053 said: echo boost is still windows only last time I checked. @ Falk are still using SU 6 or have you not updated your profile, just wondering SU 8 now. Never bothered to update my profile.