Ok I restrung my Powerangle (as above) on the 29 sept 2015 at 52 Ibs, played men's doubles, mixed doubles and 45 mins on the ball machine. 3 days later the tension was 51 Ibs wow only 1 pound loss!
It is now 12 Oct 2015 retested the tension it is now 48 Ibs, that is amazing.
This string feels great, has good power, has lots of control, the only thing I miss is the amount of spin but the tension maintenance is so good I can get used to this string.
You can get a set of this string for about £12, this string keeps it's tension so well that you may be able to get 2-3 months play out of it, well over 30 hours playing time.
Go and get a set ! Try it !
If you like playing with Natural Gut this is as close as I have seen or played with.
You will not be unhappy with this string.