Ok so I play the RF97A mainly for the past 2 years now - testing (und partly using) a lot of other rackets too - and in the form I use it right now, I still think it is the best stick for me personally. It generally feels the best, gives the best heavy shot with amazing penetration and yes, also for 3 sets in a row.
BUT here are the adjustments I made, because it can easily go wrong as well.
This is my favorite setup for the RF97A (v13) after 2 years of testing and using it as my main racket for matches and practice:
1. I removed the leather grip and put on a lighter syntetic grip (Head Ultimate or Wilson original syntetic (I think its the Wilson Cushion Pro?) - effectivly removing like 8g)
2. I only play pretty soft strings @ 23kg (like Solinco Hyper-G Soft, Hyper-G or max. Confidential (was still good) - do not use stiff strings in the RF97A like Tour Bite, or Tourna Silver 7, which instantly gave me wrist pain) Using a softer string in a stiff racket is the best combination for me.
3. I now only play 1.20mm strings (1.25 or even more make the racket sluggish to swing for me) - that's why the gut mains + poly crosses hybrid also didn't work for me, got to heavy.
4. I use 1 Wilson Pro Overgrip
5. This is minor, but if dampener, then I use a rather light one like the thin one from Technifibre
6. No lead anywhere (obviously not needed). Total weight (strung + grip/dampener) is: 357.1g Swing Weight is: 334
Again, I also own and played the Blade Pro, Ezone 98, Regna 98, Prestige Pro and Technifibre T-Fight 305 (all partly modded) and the RF97A is my favorite. Only the modded Blade Pro came close to a switch the last 2 years.
Here are some pics: