Stock Merve shafts are not so great.... I've gone through prob 8 of them.The yoke gives out or the pin that hold the wheel stud( I guess that's a good name for it)cuts the yoke apart. But they are cheap, and that's what I'm going to continue running untell something better comes around.
I also have broke 8 GPM steel shafts. But we all know they are junk. (I didn't when I bought them ). Good thing 4 of them where free replacments.