I wouldn't sleep, when I built my own CNC I used double sided tape to hold the acrylic, during a 2 hour cut I checked every 15 minutes, in one of the last button cut outs, happened to be whilst I was watching, the cut out piece didnt stay stuck to the tape or get flicked clear, instead it went under the router bit and screwed the part up and by the time I hit stop on the software the part was lost....
The router is now gathering dust in the garage until I get enthusiastic enough to rebuild it....
Must be very relaxing setting a program going on a decent piece of machinery and not a home built effort!