Hey Moto - Looks pretty good, however I think it needs a belly pan or full fairing to get the look right. It kind of reminds me of the HPE.
Have you considered making a FULL equal length 2:1 or 2:2 system with a 2 degree flare? The bike really needs one to make better power.
I think the headers that Twin Motorcycles are prototyping are a good starting point.
TWIN Motorcycles
IMO the current offerings of slip ons fall short and there is a real niche for a proper, full exhaust system.
I've got a cheap Jardine on mine so the 4 Gas EGA probe could be inserted deep enough during dyno tuning, that and to lose 15 lbs. I'd love to get a good exhaust on the bike.