I'm having problems fitting a DG silencer onto a stock expansion champer on a Tri-z. If I hold the silencer up to where the one mounting tab should go it appears that its supposed to bolt to one of the gas tank bracket hanger things? I don't think thats right because the welded nut on the frame is on the same side of the frame that the silencer mounts to. Also, the exp chamber has a smaller piece of pipe sticking out of it. I removed this and its about 3 inches long, with this removed the DG won't slip over the pipe, therefor this piece is needed. Is that part on all Z's or do I have some rigging going on? If anyone is running this set up please tell me how you did it.