Yes it was for older sleds, older heavier carb slides and throttle cable with multiple linkages. The throttle pull on flatslide carbs like yours is about as "easy" as it gets. Newbies sometimes need a bit of an adjustment period to get those muscles that work the fun flipper in good shape. Sometimes frequent breaks and stretching or moving the hand and joints around can really help, also avoid steady throttle, get on & off when reasonably possible. If all that fails, look into a finger throttle.