i find that hard to believe that a watch can determin you club head speed. it can see you arm speed maybee. but there is shaft flexablitly and hove much lag you create and how well you release the club head, how long the shaft is, and way to many variable that you can't dertermine club head speed by the hands speed.

and just as vijays speed stick, club head speed doesn't always mean a powerful hit. some people release there club head too early and get 125mph but still can't hit 300yds. and there are people that get 115mph but hit 300 yds because they time it correctly and accerate through imnapct and use the proper lag and shaft flex to maximize power. so carfull at chasing club head speed.

and as far as the angle and the swing time and all that can be determined with a cSwing or other anylysizers for cheaper.

but that would be interesting to try, hope it works for you