Anyone with personal experience here? I've got an 05 4x4 SB QC and they say they have an 80 gallon that will fit. The other one is the Transferflow Express system at 70 gallons. The Transferflow pumps into the main tank and the ATTA uses a valve system. What are the pros and cons? Also I have modded my truck and most likely will continue modding for more power. Will the valve system screw my options with regards to fuel pressure?