A Close Look at Speedmaster's Roller Rockers

I don't understand your premise that grinding on the end hold down will fix the alignment problem. Unless you intend to shim the opposite side, the rocker will just flop back and forth.
As perfacar pointed out had the anchors mounted incorrectly and the wide one was pushing the rocker inward. When removed it the rocker lined up correctly. I'm sure mounting the anchors correctly there won't be an issue.