Hi just spent in total approx 4 days trying to understand the 22/4. finally got something really interesting. I initially found that the static damping on the car was realy way off and spring rates were not correct. Car was slugish didnt want to turn in over damped etc etc just didnt like astro.
First change 6 hole pistons front and back drill 1.56mm holes. front oil 32.5 weight. rear 30 weight. second change 5 degree castor blocks (modified 22 alloy ones what a difference)
Springs rear losi Pink, Front durango Purple (losi blacks to soft 4.64lb poor front tio back balance . I also have made my own HR rear roll centre blocks with 2 degree anti squat. (New rear inside hole positions on rear A arms. get out the dremel
rear Links as follows. rear hub B - 3 - shock tower 1 or 2
Front links 3 - shock tower 2 A arm inside
outside limiters 2mm front - rear - 2mm inside + 2mm Outside
Track fast bumpy astro lots of elevation changes technical with jumps
Try these and let me know car is now EXCELLENT no additional weights batteries to rear position enjoy