Double Fish Par 40 vs V40 ball

[TensorBackhand]

check-spin them on a mirror

how does a mirror help to check?

 

[lodro]

how does a mirror help to check?

most homes have windows but the glass is mostly fixed.
Mirrors however can often be taken off the wall, laid flat on a table and provide a great even surface to test balls. In the old days, the glass used to manufacturer mirrors was also made different to ordinary window glass and had a superior flat finish.
Also, the mirror effect will "double" any fault and will make it easier to see the quality of the balls. (or the lack of it)

 

[TensorBackhand]

I tested the 30 QC-failed balls. About 10 of them have a fairly obvious wobble.

20 have either no wobble or just mild wobble.

So I guess I will just try playing with these 20 balls for now and see how it goes.

 

[hclnnkhg]

I tested the 30 QC-failed balls. About 10 of them have a fairly obvious wobble.

20 have either no wobble or just mild wobble.

So I guess I will just try playing with these 20 balls for now and see how it goes.

which means the average price of those 20 balls us 50% higher, which brings it to about the same as other 3 star balls (yinhe/sanwei) in a box.