These are modded Throw Monkeys from the Modfather with one side of the yo-yo cut with a silicone recessed response system. All of these yo-yos have been modded to professional standards.

Single vs double recess
A single recess simply means there is just one recess on one side of the yo-yo. The other side is left untouched. A double recess is when a recess is cut into both sides (halves) of the yo-yo.

A single side recess gives you enough grip with a bind to return the yo-yo. The double recess still plays un-responsive, but is a bit more forgiving if you don't do a perfect bind (i.e. there is double the amount of silicone area for the string to grab!). Both models WILL require a bind.

Both single and double models have a "concave" in the flowable silicone to ensure there won't be too much response without a bind. This is a really nice feature and many players prefer this to a flat silicon finish. The silicon should last a long time and changing the silicone shouldn't be necessary. However, if it is, just use flowable silicone.

The Modfather silicone recesses are 0.060" deep, and he uses flowable silicone. A depth of 0.060" gives the perfect surface area for the silicone to adhere to. The "concave" in the silicone gives less response.

Each stock yo-yo bearing is given a thorough Modfather clean and is supplied dry. It is advised that you lightly lube the bearing.