Because i'm pretty sure he isn't using inch and half tubes. And if i did know as a result of communication, then i could give him a clue as to length and breath of the collector because I've tried a shit ton with this method. If he was at 1 and 3/4 or 1 and 7/8, he could still try to lengthen collector for added benefit and a lot easier to do for next to no money. If it worked, great. If not, no big deal as one of the few cheap things one can try first. You're welcome.