SB rockers hitting springs and retainers

"3) I am looking at Speedmaster's Stainless Rockers, part number PCE261.1181 because rocker shaft spacers were shaped like narrow washers and the small contact area probably allowed the rocker shaft to shift toward the springs over time. I am looking to get a new rocker assembly that will allow me to dump the spacers. Anyone used this item before? "

Stay away from cheap rockers, or anything speed master IMO. I would run 273 adjustable rockers before them.