As the range of gears is only limited to the physical size of the chain wheel and the scope of the chain tensioner the slider gear can be considered a versatile gear in it's own right. Chain wheel and changer in-line 2. First segment engages next gear 3. Next segment approaches ramp 4. Second segment engages next gear 5.
Pin drops back into tapered hole to fix segment.
Third segment approaches ramp. Third segment engages next gear. Fourth segment approaches ramp 9. Fourth segment engaged in next gear. Back to start position fully engaged in next gear.