Hi Craig,
I have plotted the T3'2011 suspension geometry in Catia V5 so can tell you what difference the changes make.
Moving the link from the middle hole with the kit hub position to the shortest link hole and the 1 hole hub raises the static rollcentre by around 0.7mm. It also reduces the cambergain by around 0.1 degrees for 4mm of suspension travel. The raised rollcentre should reduce the roll at the rear of the car and decreased camber gain usually results in more stability.
These figures are taken from plotting my suspension geometry exactly, and will vary slightly with rideheight, rollcentre positions, track width etc. However, the way the change effects the car should remain the same.The key is that the change will definately have an effect. The best way to learn from this now is to test the change back to back, minimising as many variables as possible between runs.
Now you know the theory of the change, you should be able to relate this to the difference in handling with each option.
I hope this helps,
Phil Chambers
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