Originally Posted by OrangePower
Completely agree with the bolded bit, but really that should always be true. Motion and racquet head speed should remain pretty constant even for different kinds of serve. Slight adjustments in toss location and racquet face angle at point of contact is what provides most of the variation between 1st and 2nd and between different types of serves.
Well, if you put that way, then yeah I do slight variations in racquet face angle, so you could say, that, at least at times, I use a 2nd serve.