Believe me if you are even considering hanging , do yourself a big favor and get a bibhanger or bib starter. I have been hanging for one year now and have seen a 1" gain using 15 lbs 30 min per side 3 times a week. I wasted 4 months and countless trips to the local home depot and plumbing stores trying to get my 2 homemade "attempts" to try to work. Sure you can build on for 6$ but by the time your done I guarentee you'll spent 40-60 and still have something that hurts the heck out of your crank to even try to use it. Save up, beg or borrow. It REALLY is worth it!!!
When you order it ask Mr. Bib ANYTHING you like he is VERY knowledgeable and he has GAINED over 5" since he started hanging !!! And on top of it he is a great Guy!! You wont go wrong. And no I have no afilliation with him or his company. I just like to give credit and props where they are due.