If you mean the rear spring hangars,you don't have to do anything to them as they pivot to & fro.

Changing spring hangar lengths is a science in itself with regard to vehicle handling of which you don't want to know about at this stage of your experiance(i mean no offence to you by this)if and when you start to enter competitive events then sure,changes can be made,in the mean time just throw them back in once reset and it'll be all good.

Cheers