question about driver shaft

[q7w]

I use STIFF shafts in my irons, but was thinking abut getting a REGULAR shaft for my driver

I am very strong but when it comes to driving I am not 100% confident in ripping it as hard as I can. Nor does it bother me that I might be losing some yardage.

Would a REGULAR shaft hinder my swing if I'm not swinging at my full potential?

Or should I just stick with a STIFF shaft.

Thanks for looking.

[tweaky]

since there is no "standard" for what is "regular" or "stiff" as shown by the Dynacraft Shaft Fitting Index and many of us clubfitters there are several shafts on the market that are marked as "regular" but match the swing profile for a fast swing speed (100+ mph). there is every chance that you'd find a "regular" flex shaft that suits you, BUT you won't find a "salesman" in a golf store who could tell you which ones.  only those who do the research for themselves or understand how to use the DSFI or Wishon's Shaft Profiling program can tell you.

then there's always the crapshoot method...