So true!
I reshafted my barely used (5 rounds) M40 graphite shafted Data 801's with Black Golds R flex a month ago, and now I love them again.
The 120g steel shafts, cut to 37" on the 6 iron, required a lot of lead to bring them up to D2, because the original M40 graphites were 81g(3i) to 88g(PW,AW,SW) with the 6 iron at 37.75".
Luckily, my fitter is one of the best in SEAsia, and he was more than up to the task.
Time to re-re-shaft my 690.CB's with Black Golds. The soft stepped PX 5.5's which replaced the original Rifle 5.0 flighted just don't have the zip that I had hoped for.
Yeah, old fiddles can play good tunes!