There were many patents issued for this bow such as quad split limbs and a center pivot limb system. Please see last two pictures for original instructions on how to adjust the draw weight.
You squeeze the limb bolt area to reduce tension before adjusting the limb bolt cable. (Very unique lever action feature).This item is in the category "Sporting Goods\Outdoor Sports\Archery\Bows\Compound". The seller is "nanotecarchery" and is located in this country: US.
This item can be shipped to United States, all countries in Europe, Canada.