For example the game allows scaledragCoef which is just one number that changes the entire drag coef of the vehicle but what i would like is for the same thing but with weight/mass of the vehicle so if you put -250 the mass is decreased by 250 kg or something like that and +500 it increases by 500 kg. I am hoping such a parameter already exists it would be very handy for modders to quickly edit/fix small weight inconsistencies. --- Post updated --- SOLVED add into the main jbeam file this parameter here to do this.... "scalenodeWeight":1.095890410958904, this number for example adds 9.589% of the current mass to the current mass to make for example a 1533 kg to 1677kg like i did just now.