Hi all, well my ThermoChill PA120.3 radiator arrived, however ive a serious problem... everywhere i look, even the technical data says it comes with 3/8" threading for barbs, and even the thermochill barbs that came were 3/8" HOWEVER, i ordered these 3/8" to 3/8" barbs and they are simply too small. the threading on the rad looks around 1/2"? this makes no sense, am i missing something? how can it be 1/2" or close enuff when everywhere stats it to be 3/8", and even the thermochill barbs are 3/8". the thermochill barbs i got just dont fit, rattle and make no biting of the thread any ideas? also, as far as i can tell there are no 1/2" threaded barbs from thermochill, just 3/8" to 3/8" and 3/8" to 1/2"