In cases like this, I would toolpath this vector before-hand, and have our Techno cut the flat shape, having it on standby for gluing on. Or, you could just cut a rough block of 1" at this point on the saw.
We're going to assume I've now glued the second layer of material to the first layer that has already been machined.
Make sure to set it to "MERGE"
The reason I do this, is to completely remove the danger of the cutter wanting to plunge all the way to the table surface, where the geometry of the model permits. Largely between the leg area. Without this block, I would crash the collet into the model, due to the shorter tool length were using.
This machines the second layer, and removes any of the glue that may have oozed out during laminating the 2 layers. Keep in mind, the glue has to be dry. Usually we use a CA clue with HDU, so the dry time is pretty fast!
You can do this indefinitely, adding layer by layer. Without having to buy longer and longer cutters, or machine separate slices, and glue them up, trying your best to line them up together.
I do this all the time, and it certainly saves a lot of post finishing. Just be sure to adjust your material block height in the setup window for each layer.
Not rocket science, and I'm sure I'm not the only one doing it this way,
but hopefully it might help someone who hasn't done it before!