Fitz are the way too go. If the hole for the fiber is not too large you can put the .019 on and melt it down and use glue to keep it in place. The muchroom has to cover the metal that hte fiber goes through. I bought the 5 packof the longer strands and put the fibers through a piece of tubing i bought at a hardware store and wire tied it in. It works great on my G5 and is bright even under low light conditions. If you'd like a picture of my set-up PM me.