Thanks jobo! With the Uo Chikyu, I'd go with 10s since as you pointed out rounded file sya.
About your shipment, our attitude here in the philippines should be "order and forget", kasi nakaka frustrate if aantayin mo. So once nag order ako, kinakalimutan ko na, tapos one day dadating na lang yung notice from the post office. Kaya I never knew how long it took for the item to arrive, haha.
Ayan, that's the beginning of your luthier quest. Ayus yung office nyo a, dami gamit!
@Kevs - so for nut slot filing ba yan? Or more for smoothing?