does anybody make or seen a clamp on cooling ring of some kind to cool a header pipe? i ordered a Warehouse Hobbies wet header clamp with the thought of modifying it to cool the header pipe. since its arrival i've been staring @ it and i'm kinda thinking of taking a dremel with a cutting wheel and creating a channel in the middle of the inner diameter and drilling through at either end of the channel to accept two brass water fittings. any thoughts from anyone? waste of time or not?