Do not put your right thumb in the position displayed in the 1st diagram!
When I exerted force to push the board out, the RAM guard sliced my thumb open in the exact point where the thumb is contacting the RAM guard. Since it’s hard to know how much force to exert the 1st time, you may end up like me.
In the 2nd and 3rd photos, you’ll see how the thumbs are positioned above the RAM guard - this is likely a safer position.
