English: 'Spanish Burtons' are rather unique pulley usages as shown, that conserve to compound more force than may typically think. They (except first one)tend to integrate a 2nd output to pull on a Z/Trucker's 3/1 compression jig, but also use the leg of the 2nd system to pull also into the system, not on anchor as usual. This does compromise the amount of free movement as trade input velocity loss to output compounded force. They seem to bend the rules, but just follow them further around curve than we are used to looking !