Hall of Fame
Pain prevention is important, but I bet you'd progress, if you want to, more quickly with a normal length racket with a swing weight more close to 320. As you said handling the extra weight isn't that big of a deal, and conversely focusing on your technique you use with the heavy weight and applying it to a more normal-ish racket weight would give you more tennis variety and raise your ceiling of play. Juts have to use the same pain-free technique that the heavy racket forces you to use with a slightly less beefy racket.I'm a 2.9 and my fave 27" inch racquet is a VCore 330 which is almost as heavy as the RF97. It protected me from elbow & bicep pain which allowed me to hit harder & hit for longer & it wasn't significantly harder to maneuver or swing big & my performance improved (I was a 2.3 or something before). Of course I lack control due to lack of experience but that's also with lighter racquets. That bicep pain could become a serious injury if I just kept hitting the same amount of balls at the same pace with a lighter racquet and just ignored the pain. If the VCore 330 weren't on sale for half the price of the RF97, I might have gone with the RF97 instead & I'm sure it would have been fine. Having a UTR under 4 doesn't necessarily say much about whether one can handle an extra 30 grams or so. I'm a grown man. Handling an extra few grams is not a big issue for me compared to the benefits.
I've now moved onto the 28" SW102 which has a lower nominal weight but an even greater swingweight than the RF97 & it seems like it's going to be the same thing again for me but with extra reach including on the serve, slightly less maneuverable especially while I'm getting used to it, but worth it so far for benefits including the pain prevention & being able to sustain a given level of power for longer as a result.