i was planning on shimming it like that yea. any reason it has to be aluminum tho? i found a couple plastic ones from spare parts for my hpi. i think it was for the shock downstroke limiting. right size. why should i have 1mm for front and 2 for rear? would you please explain? i was thinking because i was rolling entering the corners i should just raise it for my front. does the rear affect it too? and why more for the rear? and why only 1mm/2mm? i know the rear will rub but my fronts i can raise a lot more. thnx