It refers to the replacement of the grommets in the front beam with swivel joints from the Mi5 Touring car. This gives the car much greater steering precision all round as well as making the whole assembly simpler and lighter.
You need a couple of these (
http://www.racing-cars.com/pp/New_Ca...Mi5/U4244.html) from Schumacher. Take the grommets out. The ball and socket assembly is a direct fit in the hole. Fit with the flange side down when the beam is put back on the car. When fitted, run a very small amount of superglue around the plastic socket where it meets the carbon beam. This is just a mans of stopping them falling out if you have the assembly apart - they can't fall out on their own. That's it.
My set-up is to have both carbon spacers under the beam, and then the bolts go through that and thread into the balls. Do the bolts up then nip them to clamp them in place. Don't over tighten. If you are worried, put a nut on top of the ball for safety - I don't bother.
Now set the ride height by putting spacers under the spring as in the kit instructions. You are aiming for 6 deg castor when the car is off the ground. Depending on your tyre sizes, adjust the height of the front of the beam and the rear using spacers so you have at least 4mm ground clearance and 6 deg castor.
Now set the car up ready to race with everything fitted. Adjust the front springs so it has about 0.5 to 1mm of 'droop' in the suspension and then about 4 to 5 deg castor. Make sure the spring pressure is equal on both sides. Set the ground clearance to 3.5 to 4mm.
Now set the rear ride height to 4mm minimum and again set the 'droop' to about 0.5mm to 1mm. The chassis should be level - same ride height front and rear.
Don't set the ride height to what you want on the track. The bodies weigh 80 to 100 grammes, so when fitted the car will drop about 0.5mm. Fit the body and confirm you have 3.5mm minimum ride height both ends - chassis level. Use 4mm if your track is bumpy.
I think it is well worth it. My car went from being a bit random on occasions entering bends to being as tight as a 12th car. £4 plus 0.005p-worth of glue and an hour or so to fit it all and I have a lighter and more accurate car. What's not to like! HTH
