I've been wanting one for a looooooong time. I have always just gone over to my coaches house to use his, but last night finally finished building my own. I even ordered what I believe is the best scale on the market for everything you would ever need related to archery.........the Pelouze 7710. They are expensive, but worth it in my opinion.
I just need to find an aluminum yard stick that I can cut appropriately and mount on this, and then I can even plot and chart out draw force curves. I've already perfectly synched cams on the Constitution,set correct letoff, and measured exact DL on it after installing a new string yesterday. I will also be using to help time my new Limb Driver that should be here in the next day or two.
Ireally just need a chrono and a full size press(likely a custom BowTrix), and then my dream bench and peg board setup to have my own dream shop complete. This was one of the last and most important pieces that I was missing........now I just need to organize it all with a killer bench setup.
One of these days I'll put together a parts list and instructions on how to use. I'll likely writesomething uplater this summer/early fall.