I have been using Mamba Black Ion Rough in my Head Extreme Pro for the past 2 weeks.
It is a really good polyester string. Ball pocketing is really good. Spin is good too but not crazy spin. I normally use Kirschbaum Pro line II and this string is at least equivalent.
In 1959 Detroit was the wealthiest city in the US, Cuba was the wealthiest country in latin A. Happy May Day.