http://shaftfit.wishongolf.com/ <---you do need to know your stats. to use this S2S Shaft Fit module. I am not sure Diamond UK has all the shafts in the module. Make sure you fill out ALL information as it skews what comes out if you don't put info. into all fitting factors.
Personally, I use S2S Green for woods and tip them to "S". That's just for me though not anyone else. I am 86 mph driver SS, 1.4 sec. transition time, smooth with acceleration thru impact, a swinger not a hitter, medium release.
JMO but this is why most golfers can not shaft fit themselves as they don't really know their stats. or are relying on simulators that aren't good. Video yourself and that will illuminate release, transition, etc.
The last S2S shafts I got were the new ones dark with various colored rings on shafts. It's the face angle, loft bending and weight ports that make Wishon a good head to work with. The 919THI is still one of the great forgiveness 460cc drivers and playable with good distance. The one, I play is as long as anything I have hit including the new major brands.
Also should add the rebranded Apollo shafts that Wishon used are not available in some variations. ie. Superlite, wedge shafts, unsure on stepless. Part of that is supply chain issues world wide golf.