heh trust me... you will want to use the peice from your bong. it will get you ripped right. I have one i made out of pvc and made a bowl and everything for it ill get pictures up of it soon. I turned a bowl for it on a lathe and used some brass tubing as a down-tube. it holds close to a litre of smoke

the bowl is attached to a metal downtube that slides inside of the small pvc extension.