I am 66, used to have a 15 handicap via Ping i3-O stiff graphite iron set Green Dot, Ping i3 woods stiff graph, Drivers all Ping stiff, eventually settled on G10
Two years ago, handicap faltered, so Ping fitters said Green Dot G25 reg.graph, so also got G25 woods reg.graph; at first, handicap fell -11 strokes then began to rise. Blamed it on bad weather, infrequent play but even that truth wasn't all the story.
This Spring eBay trials discovered G15 iron set, reg.steel shafts YELLOW DOT (as per that the darn chart said, but was denied by fitters). These are now Spot On like never before.
Now ... what to do about the woods?
G25 3W reg.graphite replaced by Rapture (strong) 3W 13d+ reg. graph = acts like a 2W
G25 5W reg.graphite suspect to be replaced by G30 reg.graphite ... jury still out
thanks for your patience, now my answer
G25 Driver reg.graphite replaced by G30 10.5++ Senior Flex graph and ooohlala, effortless fairways hit, often long ... for me. I still still get 270 yds roll out like the old days but only 200-225yds carry (ugh) regardless of shaft stiffness, so why kill myself in this heat?
The only remaining consideration for the Driver might be to replace the shaft with a Senior 80 gram, which may be as much as +15 gram increase. This is personally based upon past shafts that have been good to me, more natural idiot-proof swing results.
Also, if I replace 5W w/G30, it must also have a reg shaft in the 72-80 gram weight ...