Make CAM patterns work similar to Model patterns

[fritter63]

When creating a CAM pattern, it would be good if you had the option of de-selecting some of the instances in the cam operation, similar to how you can do it when modeling in a pattern.

Use case is something like this where I had a piece of leftover wood and wanted to machine only four pieces out of a 6 piece grid (sure, couldn't have just let it cut air, but that is a waste of time!):

[CarlM89]

I need this feature as well. It would be a huge productivity booster. I have a 3x3 fixture and I don't always fill it up. 4 parts works, 3 parts work, 6 parts work. 5, 7, 8 pieces end up cutting air, or I have to do smaller sets of parts and re-post separate tool paths.