Centre silencer removal...again...

I've recently had mine removed, I used Custom Chrome in Nuneaton, they chopped out the centre box and made up a section to put in, cost 50 quid and it sounds awesome.

however there is now a noticeable flat spot, it doesn't really bother me though, you quickly learn to drive around it
 
I don't really notice the flat spot, it's more the 'kangarooing' that I get when the engine is cold. I'd love to hear the sound in person.