Tecnifibre TF-X1 300 Tennis Racquet

I've been playing with a Babolat Pure Drive for ages and decided to give this a try on a recommendation from a friend and was not disappointed. It feels less stiff but still gives plenty of power. I think that's from the higher swingweight? Either way, I really like it.

Me: 4.0/4.5 hard hitter, singles 25%, dbls 75% these days. Journey last 15 years: Prince TT Scream > Babolat Pure Aero > Wilson Clash 100 > TFX1 300. I left the Babolat as it caused recurrent elbow issues and I switched to the TXF100 @ 43lbs to gain power and depth over the Clash...it delivered power, BUT, the frame is very stiff and unforgiving on off-center hits; feels extremely head heavy and causes fatigue by 3rd set. I've lost confidence at the net, not nearly as nimble as the W Clash (which has nice feel but no power). Ground strokes land deep without any new adjustments and creates a very heavy ball, but serves must be struck precisely with a lot of effort to stress opponents; aces have decreased because I find it hard to hit my spots. With the accuracy of the Clash I could run my opponents legs off, but less outright winners. Now, I'm crushing winners with more regularity with the X1, but the penalty again is arm, and other muscle fatigue. The racquet is powerful if you can get it around to the ball in time. Hoping to acclimate to its hammer-like balance soon, or its back to my well-worn Clash.