Just say.... I have a 60g Regular flex shaft. If I tip it one inch , would it in essence become a stiff shaft with a softer mid section than a factory stiff shaft ? I think Nate said you lose 5-6 swing points if you butt trim a shaft but how many swing points if you tip trim one ? Having your cake and eating it too is impossible with a stock shaft it seems. Maybe its impossible period , HA. @NaydelmanCG ?
The change in SW is a result of the length change, not weight change. So regardless of whether you trip at the butt or tip, the change would be the same. The rule of thumb is 3 SW points per .5”.
As for the flex, trimming a club will make it sightly stiffer, but definitely not a full flex stiffer.
@RickM I don't know what you're chasing after but you've been in full on shaft mode for a while now. I'm not sure why you think you need a stiff board as a shaft but maybe that's just what you're comfortable with. You must be super steep and agressive with your swing. I think you might finally be happy if you went to an old school steel shaft in your driver.
When I've tried tipping driver shafts for a hybrid, it just didn't feel right. Removing almost all the parallel tip and butt trimming made for a dead feeling shaft.
In irons, soft stepping, 1/2 inch less trim, generally changes flex by 1/3. Not always as it is shaft dependent.
I think you should just try a shaft with a different flex profile. If you want a shaft that feels smooth but can handle a bit more speed, try graphite design ad series. I’ve used the ad di 6 for years because it offers a smoother feeling and a bit of a kick with keeping spin rates under control. It has a stiffer butt and tip while keeping a more flexible mid section. As for hard stepping, I’ve never found this to work well for myself, still too much dispersion, while soft stepping a stiffer shaft a step has worked in irons for me with x100 shafts. But ultimately I wound up finding a better shaft for myself in the end by getting custom fit. Good luck, but I’d just give a few different shafts a try.