Check out my Personalised Tr18 too!
So, here it is... I made this thing from around 4 pics, it was not so hard. It features: Slide, ultra strong stock, comfy handle, custom sights (they may not look nice, but they are very accurate), very comfy front grip and last but not least, the rachet mod. I don't really know if you can have a 'personalised' Br8, because I don't really know if there are official instructions... I just made it of the few pics that where around on Ibles and KI.
You'll problably noticed that the stock is EXTREMELY long. That's because i have very very long arms xD