januslow, thank you for your contribution. it was an interesting read as i'm soon going to string up the b5e. in respect to the black venom rough i want to say the following: as i know (from reports on the stringnet and from manufacturer recommendation) that the polyfibre has a higher stabilization loss as compared to other polys, i strung it 0.5kg higher! therefore i did not have the issues you are talking about. generally though, in order to prevent from this initial tension loss i do with ALL the strings the following: when i take them from the stringing machine, i put them on the carpet and step about 50 times quickly on the stringbed (i have 75kg). this produces a stretch and with most of the strings i do not experience this initial tension loss that usually occurs during the first hitting session. moreso, i usually don't play them 24hours after stringing, allowing them to settle in completely. some strings still have a second tension drop which in most of the cases is also the moment they go dead, other become a trampoline (very few). it is interesting though that in spite of having about the same playing window (approx. 10 hours), the shape of your venom rough was worn out after 2 hours, while mine really lasted up to the 8-9th hour, and i am hitting pretty hard with lots of spin. as my timewindow seems to be shortening quite considerably, i will "revisit" some of the strings. my son (and most regular hitting partner) has raised his level over the summer, so i need to make some adjustments and therefore basically plan to play again with some of the strings tested so far. i also use to keep some back-up of the strings i like, in order to be able to make some back-to-back playing with the ones i'm most fond of, so this thread will not be a "very speedy race" in terms of adding new strings to the evaluation at a very fast rate.