My 1/4" spacers are from MM & they are light as hell. I didnt need new studs either. I dont see how a 1/4" thin peice of metal is gonna cause some type of failure??? There is plenty of thread left & like I said the are super light. Its the cheap 1" spacers from pep boys with internal studs that might fail, but the
eibach 1" spacers work fine as well. i know plenty of people that run them with zero problems. They dont weigh more than a few pounds & use strong studs.