Which god talks about the configuration of traction rubber band?

You can't look at the round ribbon beads alone, but also look at the distance of pulling, whether it is pulled to the limit. For 2040, the recommended ratio is 6:4. If the drawing distance can be greater than 90 and the drawing limit is reached, 8 to 9 beads can be brought, with good initial speed and short service life, mainly at the position of 1632. If you are sure to play 9 beads, it is recommended to try 1842 and drag 1636. If it is less than 8 strands, it is directly 4 strands 1636, which has a longer life and is relatively convenient to manufacture.