Ok, you're a high school player, and at the time, I was 50 yrs old, so take this with a grain of salt, but...
I tried 4G Rough once...once (sorry, old joke. Go watch 'Johnny Dangerously' for explanation. But I digress...). After 2 sets of 4.5/5.0 level doubles, my arm was toast. I could barely put my seat belt on, let alone grip a tennis racquet. Two months later, I got a Cortisone shot. Six months later, I was still having issues w/ my backhand volley as I was afraid it was going to hurt my arm.
I also feel the need to qualify this by saying prior to the 4G Rough experiment, never have I experienced a twinge of tennis elbow, and I've played w/ racquets that had an RDC of 68 & 70 (Hyper Pro Staff & Pure Control 'Swirly'), and were strung w/ Kevlar/gut in the upper 60s. The 4G Rough was put in my normal racket at the time (Fischer Pro No 1 that was 3 years old), and strung ~ 48lbs.
Bottom line: Don't. Just...don't.