Thanks,  yeah the mistake I made was I did test it on a piece of scrap for cutting,  and it worked great,  never thought about the size of the slot being wrong I guess,  oh well. 
Here are just some pics of the lock and acrylic over the bezel after cutting it to size. 
The last pic is where I mounted the Volume control for the speakers,  this worked out perfect I think,  no one really sees it but its easy to get to if you need it,  I found this to be really handy as alot of the games seem to be at different volume levels.  Its mounted directly underneath the control panel underneath in the upper corner.