I've used the GT5/Zy62F combo based on the experience of some members here. Here are my thoughts on this combination. I've used this combination for almost a year on at least 3 rackets.
These are the rackets -
A77 pro ( slightly HH / EB, medium flex, 4u g5)
ARS 98k ( HL, very stiff, 4u g5)
Babolat x-feel essential ( EB, stiff, 4u g5)
String color
when playing with M350 is white for both mains and cross. Tension is 25*27
when playing with feather is orange (GT5) & white (Zy62F). Tension is 27*29
I have a Zy62F reel, while I buy packets of GT5 ( unable to fins a reel

, somebody please help me out ).
The quality of the string from the reel has been consistent so far. I've had mixed results with the GT5 packets. More often, I've observed that the GT5 string frays while stringing on the middle two strings either side of the shaft.
Is this a common occurrence on the GT5 or any other main string, thoughts?
Could it be a bad batch of the string or a mistake by the stringer that can be rectified with some advice. Please help
One more thing that I've seen through out the year with this combination is that my main string moves after a hard short and needs to be adjusted. Kinda annoying after a while. If there a near permanent fix for this?
IMO, I like this combo better than the standard offerings from Yonex (AB / ABB). I've tried GT5 & BG65-UM - didn't like this combo as much. Felt soft and nearly wrecked my shoulder trying too hard to hit hard. Probably my mindset was to blame for the poor show. I haven't tried this combo again.
Once my stringer made a mistake and strung the GT5 as a cross and Zy62F as a main. It was awful and I got rid of it the next day.
Any thoughts on my queries will be much appreciated. Thanks.