Recently got one of these really cheap. I'm considering adding a digital meter. I had one lying around and tested it - appears to work. Is this a sensible mod? Also I'm a bit puzzled about the patchbay of screws on the back. Can anyone shed any light on this?
![Popcorn :popcorn:](https://www.eevblog.com/forum/Smileys/default/EatingPopcorn.jpg)