I saw them at the Manchester Bike Show in January & went to have a chat.
They used to be based near Lancaster, but have moved recently to somewhere near Warrington, I think. anyway, the guy in charge was explaining that they were getting a kit ready for the GS & they will fit it & dyno it as well as they have one of the top dyno's which includes fuel metering checks. I have had a Superchip fitted by Jefferies & he knows the company well. He was saying that he can send them the dyno data & they will send him the fuelling map to set it up with the can. Sounded great, but I've already got a Remus/Y piece & a dyno printout to show that it's running fine but it might be a good alternative for someone out there.