How to square up an angle plate

[DaveH]

I'm the same I don't leave a machine while it is running. Not even the band saw with the auto stop, because as an apprentice if you allowed the cut piece of metal to fall on the floor the whole of the tool room would bang on their work benches. 
Plus if you are not next to the machine how will you stop it if something starts to go wrong, wait for the crash bang.  
 
DaveH