I wasn't too impressed with the Edco "Grip" threadless cartridge. This unit uses eccentric cups to lock the cartridge in place. A clever idea, in principle, and it allows a wide range of chainline adjustment. Itt worked well for most of a season, but the problem I ran into was that in cold weather, the aluminum cups shrank more than the steel shell, and the cartridge would come loose in the frame.

I had been using it in a frame with no useable bottom bracket threads. I ended up getting the Bicycle Research bottom bracket reamer/Italian tap set and cut Italian threads into the shell. It's been fine ever since.