The Integrated Drive System, aka IDS is the cutting edge method for mounting wing servos in high performance aircraft. The term "mono" refers to the single piece push rod that this style of IDS uses. The servo trays have an outboard ball bearing that helps to carry the servo shaft loads and greatly reduces servo play. This superior design minimizes servo slop and reduces drag while simultaneously increasing precision and efficiency. The trays also allow for very easy servo changes. This version is designed to work with the KST wing servos. (225, 125, 135, X10, X10 Mini and others.) Pre-molded push rods in 12 different lengths Can be used on ailerons and flaps Durable plastic frame 6 different servo arm lengths Support bearing for additional load distribution Easy and quick servo changes