Not that good at it at all (yet) 

 And there's SO much more competition 

Some brilliant guy wrote 4F instead on the EPROM I just pulled from the board from position 6F.....
Gonna send them to my colleague, he will erase and re-burn them with the original files.
If only we could phase out the fire alarm systems that we are using this burner and eraser for.....then I would definitly get my hands on them ! 

So far I've done some reading/checking of EPROMS. Worked great.