I checked the speed of the bow about 3 months prior to using OT2 and was shooting about 275FPS and OT2 said the bow was about 271FPS and so I left it at that I don't have OT2 anymore but I would guess hat 4 FPS would not make that big of difference but I could be wrong.

As far as the wisker this is my first one and I am trying to make it work due to lack of funds but I think I would do much better with a limb driver.