Mwahahaha. OMG...
The problem with the first one was it was almost oem in terms of sound but it had lost the pops and burble.
The centre box was removed and this brought back the pops and burbles. But not the exhaust note while moving.
3rd attempt seems to have got what I was looking for. I now have straight pipes and a straight through back box.
An awesome deep burble on idle and glorious sound on acceleration. Doesn't seem to droney at speed so far.
I'll try and take a video in a bit.