All of Border’s limb sets are produced and matched in pairs and as a result have the proper tiller pre-built in to each limb set. They are in effect matched.
The effect are limbs remarkably well balanced for higher output speeds and reduced limb vibration. The other advantage of hand adjusted limbs is that the full adjustment range or your riser is available for bow weight adjustment.
Limb sets that are mass produced are all zero set or approximately zero set and require some of the limb adjustment capacity to balance proper tiller. This practice approximates proper balance but some recurve action is reduced on the bottom limb setting up an small imbalance.
All Border limb sets from the most expensive to the least expensive and made in matched pairs.