Help machining aluminum training knife

Looking to make a training knife out of 1/4" aluminum. Have machined aluminum previously but they were simple two dimensional objects (wrenches). Feed and speed recommendations worked well (as have most of the suggestions on the forums). Looked on this and Vectric's forum to look for info relating to this type of 2D+ cut but wasn't able to find anything that seems to point me in the right direction. Picture is not my design but representative of what I'm trying to do.
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