I'm just about to add the knife to my Helios handle. To be honest, I'm just wondering about drilling the hole in the handle. I don't know what the handle is made of - and whether I need to do anything to protect against rust once I drill through it. I would expect it to be pretty resilient stuff, but before I make a hole in my beloved light

, just wanted to check if anyone has any experienced any problems or if there are any pitfalls I need to avoid...?
thanks!!
Andrew