It looks like you got the corners already, so I guess you just have to look for spots on the PCB that don't have traces on either side, and cut them out.
It looks like you got the corners already, so I guess you just have to look for spots on the PCB that don't have traces on either side, and cut them out.
No problem, and here's a picture where the blue lines should be safe spots to cut, even though trimming wouldn't get you very much extra space. If you cut it though double check the other side of the board to make sure no traces would get severed: