The Indy BB push rods come out of the package ( newspaper) with about 1/4 of them crooked when rolled on a flat surface--you can expect cups to fail--I am sure there are MANY reasons that happens--at Indy they beat the cups in between two pieces of aluminum so they are not putting them together any different than most folks--The machining spur left on the ends of the adjusters start the process for many folks I think--I have had many sets "work" but when cups fall off with Indys and do not with Smith or Mantons well......I say the Indy units are junk--it is just my opinion --Go Smith Bros and never look back