All I did was cut the back out of the original bend until it was at the appropriate angle. Then I added 150 mm (or 6 inches ) of tubing to the end. I then TIG welded everything, cleaned it up with a nice fine grit sanding disc, then hand polished until I was satisfied with the finish. The exhaust is painted in high temp aluminium paint until the weather gets shitty enough for me to take it off the road for a couple of weeks to get them re-chromed.
If you were to pay an exhaust guy I don't think it would cost much at all.
Also, the mufflers now sit closer to the bike, narrowing the rear profile.
I can't believe how much better the bike looks. That kink used to piss me off something rotten every time I looked at the bike.
About buying a Bonnie in order to make it look like a Thruxton. That wasn't the intention when I bought it, a few mods were for comfort. How was I to know the Bonnie seat is like a plank of wood. And rearsets make for more comfy open road riding.
Besides if you don't like it, who cares. Stop over analysing things and ride your fucking bike you pogue.
The rest of you guys know where it's at.
Peace.