1) I am having trouble picking exact location of hole for drilling cam op. what am doing wrong?

2) Is there any info on turbo cam plug-in, besides the tutorials on the disk?

Not sure if it's the right fix but try zooming in before you spot the hole center. Thats what I do.

Regards
Phil

1) I am having trouble picking exact location of hole for drilling cam op. what am doing wrong?

2) Is there any info on turbo cam plug-in, besides the tutorials on the disk?

If your part is a solid it may not always pick up the right center. The same goes if the hole was made using splines and such. To work around this you use the "draw circle by three points" tool and pick 3 vertice points on the hole. It will draw a circle that you can pick the center of.:cheers: