As my title. i went to AJ puchong string for 2times indeed the tension is good but the string keep ran out of position. wondering its the stringer cause this? String used - BG66UM , Li Ning AP101N (0.65mm) Tension - BG66UM - 27lbs ,Li Ning AP101N - 26lbs.
The 66um does not have a rough coating so the strings are going to move. All strings move to a certain extent anyway, just some are worse than others. Also, if you tend to slice the shuttle more, the strings will move more.