Simple: ask Hel.
This is in 100hp , right ?.Brakes have awful pedal feel ( over servo-ing causes kangaroo-ing- at least in some early (?) year models ) and heel and toe-ing is next to impossible .One of several flaws in what could have been a dream car .Off the top of my head you can also include the need for a longer sixth gear for fuel economy , maybe a turbo /20-30 more bhp , wider torque band ,OBVIOUSLY a softer rear suspension , less sensitive to tracking loss , the latter may be to blame for insecurity at high mph esp in wet .
Post 2008 they changed the servos if I remember correctly.
If your car is insecure on the road there is something very wrong with it. I threw mine around at ludicrous speeds wet and dry and never once did it ever do anything other than full power understeer that one would expect. If it is insecure try different tyres and new dampers. You are missing out on sublime handling and glorious fun. If it had a limit of its grip, I certainly never got near it. That was on Toyo Proxes tyres. These were good wet and dry and wore well too.
The best thing about the 100HP was barrelling into dual carriageway roundabouts and braking down from very high speed before slingshotting out of the roundabout. I could stop the 100HP from 100mph in 75m where limits allowed. These cars are BONKERS and such fun. I wish I had kept mine. I practically gave it away in px. Insanity. There are few cars that can keep with one of these on a (smooth) windy road.