I can't read Thai but i believe the website has the training price in hourly basis? or weekly basis? how much the price?
http://ponsana.startsportarena.com/index.php?option=com_content&view=article&id=2&Itemid=11 It classified into Age & Time per week & month For example : BASIC COURSE Age 5-15years - one time per week , 17usd / Monthly a bit expensive in THAILAND
I am not quite able to find more info of the F series. It seems very tempting as Fujikura Golf shafts are very famous among golfers' world. It would be very interesting if the wooden golf shaft is implemented on a badminton racket. Can you provide us with more info?