i am thinking of air suspension so i can put in garage.can anyone tell me what the height difference is on rrc airbags.i have a 2" lift but am thinking of going back to normal height which means i will need to drop 4"from standard height to fit garage .i am not wanting a fancy all singing and dancing system all i want is normal height and drop for garage so im thinking electric pump air resevoir two accurate flow regs one front one back then a valve to let the air out to isolate from the feed and let down.so after all the long winded waffle will rrc airbags give me that range?