text: required bga manual  rework sation  and  economical?   that is an odd combination, bga re-work stations are generally very expensive. you can make one with the help of an old ceramic heather and a heat gun, but the devices you take out will no longer be usefull.   if you want to be able to re-use the components, you need to buy some expensive equipment with very accurate temportature measurment as well as esd safe surrounding.