I know this has nothing to do with mustangs but this is very simular to what you guys do and I ask your help. I hooked up a Split Second FTC which is very close to a Tweecer in a TRD blown Tacoma. When I hooked it up I used crimp connectors to hook up this unit to the wires on the ECU. These look very professional and easy to work with no mistakes in such a tight area. My tuner said that I need to ditch these and said using these will cause problems in calibrating things and improper sensor readings. He said I need to get rid of all the crimp connectors and soldier the wires together instead. Does this sound accurate? It doesnt to me because I thought this was the right way to hook sensitive electrical equipment up. What do you guys say before I go tear into this again?