I have three racquets. Voltric z-force,superwaves 37 and bravesword 09. I use my z-force but I haven't broken my strings in a while and I'm wondering will having my other two rackets strung at 24 lbs damage them in any way.(I don't use them at all. Just sitting in my racquet bag)
nah... 24 lbs is nothing, don't worry about it as long as it's not exposed to extreme temps like -20C or 40C.
In the hands of a competent stringer, VTZF can easily be strung @ 30lbs without any problems. so yeah...to second visor's comment , 24lbs is nothing to worry about
i don't even blink when clients ask me to string 24lbs. in fact, that's the norm tension for most people.
when players brag about "X" lbs of tension, i'm always skeptical of whether they're actually being strung at that tension, especially if they don't mention if it was done by an ECP machine if you provide the stringbed frequency also, then we'll all know for sure if what you asked for from the stringer is what you got