Updates...
After 4 years of racing my front upper arms did get some play and one did fell appart so it became time to replace them. When I did create this suspension I already noticed this could be a weak construction and already had thoughts of another construction.
left: old arm
middle: electric part to connerct wires (do not know how to name that)
right: new upper arm
I did fit a brass tube into the part and fitted a M3 screw. Did solder it all together and made it to the right dimensions. I also made a few extra as spare if needed.
Last race was very good but the car was a bit out of balance. I fitted some shimrings with the springs to take out the tweak:
Zero tweak !
I also made some small changes to the toe-in, caster and camber because there were some differences between L and R and to create an even better steer response on our small track.
And mentioned in another topic a new servo which did make a huge difference in last race:
http://www.debaanbrekers.com/ftp/hs5084_servo.wmv
The Hitec HS5084-MG is at this moment the fastest digital servo to get.