I used a dremel to install the fiber option lighting for Elis mod. It was super quick and I had better control than a drill. I think there were 60 holes! I can see a soldering iron working too.
Quoted from tekhmaster:FYI, Instead of drilling the holes you might want to use a soldering iron or wood burner. It melts the holes without risking cracking the plastic. Saw that tip in another thread and it worked great when installing one of the mods on mine (can't remember which atm).