I've never felt comfortable with the stability/solidity of swivel/tilt vises. Unless I need an angle I use the vise flat on the table without the swivel base. Maybe I'm too old fashioned, too sensitive. But that 's me.
these are the little blocks that came with my vise. they are just about 18mm on the nose. I do plan on fixing them at some point but it's just not a priority, I had to search my junk box for them.I can't recall a vise where the T slot groove was 5/8" wide. I always have to machine 5/8" T slot blocks to something like 1/2" to get them into the groove. Sometimes I just turn round "buttons" that fit the grooves and the T slots from drill rod. They are not as good as rectangular T slot blocks as they do not have long surfaces which are better for wear,but they work fine for me and still fit the T slots snugly after years of use.
I have had no problem with them getting the vise perfectly aligned when I put it back onto the mill.
I've never felt comfortable with the stability/solidity of swivel/tilt vises. Unless I need an angle I use the vise flat on the table without the swivel base. Maybe I'm too old fashioned, too sensitive. But that 's me.