Ya that exactly what i said. Been on prof forever no torsional stiffness problems what so ever. The fact is prof are overkill stiffness and thought they would come out with lightweight cranks finally after all these years. Use some fancy case hardened japanese cromo in thin wall and forget that stupid looking gusset and probably knock 5 ounces off arms alone. The original arms with ti spindle,ti bolts and bossless sprocket is almost as light as saint crank setup. All they had to do is tweak the old design. This new crank is huge failure and anyone looking to spend $500 on cranks probably can figure out how to take a normal prof arm off. That wedge system make it too easy to come off. Watch the new arms start flying off.