Anyone tried to fit slip on pipes besides what is sold specifically for the Rocket3?

I recently spent $50 on a Triumph Thunderbird pipe. A few days with a grinder and a bit of welding and she's a slip-on to the unmodified stock headers.
It was more of an experiment to get ride off stock muffler to free up space for moving foot pegs backwards, but I like the sound and the lines are cool too, imo.
 
What is this obsession with changing the stock exhausts? I've not seen a single one that looks better and without an ECU change, performance will no be seriously affected.
 
This is beautiful and "Classy."