Rob P/A!
I also really like the Viper sight's and I just might go out and get one for myself ,I just can't have enough toy's .
Buckhunter!
This is where I got my fibre from
www.fibreopticproducts.com I got the .5mm diameter for the .19 pin's ,they ship out the same day as you order .
PaBowhntr!
I'm hoping this is the solution that I'm looking for ,only time will tell.As for how it'll work as far as durability. There shouldn't be a problem with 3D but as far as tramping through the thick stuff ,this has me concerned as well ,but I got lot's of fibre to make replacement's if i need it .
nubo