i just made mine 8 gms lighter by swapping out most of the steel screws for the ti screws from my old car,so with new tyres its on the 1350 limit,old tyres were 6 gms lighter again so might need to add another 5 gms so its not underweight after a run,
just need to test it now,so hoping to get to the track this afternoon,i also have a new motor,went from a gm to an lrp x20,so need to set up the gearing