1-I can't see it simulating doing the holes. It could be that it's too fast to see. Some more info might be required on that.
2-SO, the "drill sel circles" is explained. Now what is "drill rad circles" feature.
3-PS> how did you insert the image in your post.
1- Yes, I think the "cutter" is just a general visionary thing, I don't think it's supposed to be too specific.
2- Have no idea at this point, hopefully someone will be along to explain it to both of us.
3- You can insert an image when replying. When replying, take notice to the "'Additional Options...'' link. You can add an attachment when you click it as it gives a few other options as well. If you get an error when trying to upload, it's either too big or someone else has used a file in this forum with that name so you'll have to rename it.