Quick update , finally got to the bottom of it I think , contacted dark side , they said the vibration is caused by to much torque and is probably flywheel judder ,I asked if there would be any damage caused , they said probably not as I’d only felt it about 5 times before I took it back to stock they recommend full custom dyno with more progressive torque delivery and to get the most out of the map they recommended a gearbox map with increased torque limiter and other settings like 1st and 2nd delay fix , quick shifting , quicker launch from stand still and other things , they recommended stage 3 gearbox map with custom tune as they have the capability to match the torque to the flywheel , very clued up on what they was talking about , they said they have never done this exact model , and said they wanted it for 2 days so they can really get into it with road tests , I’m definitely impressed with the gearbox side of things , they even come out with you in it for the test , it’s booked in on the 11th October , so hopefully this is it , sounds like they know there stuff , hopefully this will help others on here with similar problems 🙂