SA, Sure that would work! You could easily shape something out of wood to hang the weight on. If you got a hunk of lead for the weight, you can carve that down to what you need. Or if you're a fisherman you may have a lead pot to melt sinkers. Steel is tougher to work with, and aluminum was too light. I had a chunk of stainless steel that I used and just kept shaving off the bottom until the weight was correct. The "official" weight amount is 880grams. I think that is 1.94lbs. I'm lucky I have access to VERY accurate and calibrated scales here at work, but you could always take it to the Post Office and check the weight on their scales if yours doesn't go that high. My scale at home didn't.[:@]
I checked a Mitutoyo 1" dial indicator which is different than the one I used on my jig. The Mitutoyo also approached 100 grams of spring force near the 1" of travel! Just by pressing it with my finger I would not have guessed it to be that much....
I don't like the bolt for a weight because it has to be placed exactly the same way each time or the reading will vary a bit.
Exactly why I went with the hanging weight by bearings method. Very repeatable and smooth on the rotation of the arrow. Those .59$ cabinet rollers may not be fancy-schmancy bearings
, but I bet they would still be smoother than having the bolt head directly on the arrow shaft. It would be a cheap experiment for you to try out! Couple of hours of tinker time with some cold beer.....