well this new cdi i got which was 1 a 10d30 does not work its bust. So im sending it back to where it came from. But i can confirm that the m-max box does remove the power limiter in 5th and 6th gears. As before i had the m-max on it would stuggle to get above 100mph in 5th or 6th. Now it'll pull easily to 115mph uphill i havent had a piece of road long enough to test it yet as i live in the countryside and the roads round here are crap loads of twisties which is great for the b4.