You're essentially soft-stepping if you don't tip the shafts. I believe it's about 1/3 flex difference each time you to tip a shaft, so if you wanted a regular flex shaft to play like a senior flex, you'd take an untipped or 1 iron/1 hybrid shaft and put it in a 4 hybrid to get to roughly a senior flex. I'm no expert though so hopefully someone else chimes in if I'm way off base.