Copy your profile onto a second layer. Draw the tabs that you need on that layer.
Then, profile the part with the original layer, down to a safe level that will keep the part safely attached.
Then, create a second toolpath with the tabbed profile that you created. Cut this level all the way to the bottom of the part.
I prefer to rough the profile most of the way down with a cutter that is quite a bit larger than the finish tool. This provides a wide enough kerf that the finishing tool will not be nibbling the edge of the waste and wanting to pull it up and cause havoc. Also, you need a little bit of room to permit the tool to get in and around the tabs without descending/ascending immediately next to the finished part.
It's not dead simple, but then you are the machinist, and you have to do something to keep your elevated status