I've tried the 0.64mm string (on my 9x) as recomended by Mr. Lim of Artic Sport. Basically, is it quite nice but due to the electronic stringing machine he use, still not up to my preference - feel/touch. If HongLi have this string, that will be great.
What is it about Hongli that makes the feel good? Why dont you buy the string and bring over to hongli to string? What tension did you string it at?
at the same tension which 25/27, Hongli stringing machine has done a good job compare to Mr. Lim's machine.
I think "HART" is related to GAMMA because both of them are using the nearly same packing(color scheme) for their strings.
Compare between GAMMA 0.64mm string and the RSL 0.64mm, I still prefer the GAMMAs as it produce better control and feel. RSL one is too bouncy.