Ok guys, I know this sounds like a huge pain in the ass to do it this way...But you will probably save yourself all the frustration.
I had a set of Akras to install at the same time as sticking in the new LED tailight. Once the silencer (or slip-ons) are removed, you take out the 6 torx screws holding the plastic housing to the frame/sub frame & the two longish silver bolts holding the duck bill to the sub frame. After these come out, the duck bill & whole tailight assembly can be lowered substantially, making it a breeze to get to the two tailight bolts. Believe me, after reading all the shyte about getting to the tailight bolts, I was not looking forward to replacing it.....but by having to remove the silencer at the same time, made the whole job an absolute breeze. Ok so it's a couple more bolts to undo, but If I ever need to get to my tailight again, I know I'll be popping off the slip-ons....hope this helps guys. I can shoot some pics of the screws etc...in question if my directions are not too clear.
Cheers Rob