The USRSA lists two i.prestige mid sitcks - early and late. The late has a power rating of 1570 while the early's power rating is 2019. Does anyone know when the early models ended and the late models began? I hit with the nsix-one tour yesterday and was impressed with its stability, control and power, which is rated at 1931. The lack of power with the i.prestige mid is troubling at times and the nsix seemd to give me the extra pop w/o losing control. I assume that I have the late model b/c of the noticiable difference in power between my stick and the nsix. Also, are the early models available anywhere?