Did you ever tun these on an 80? I'm curious if they are tight on the hubs. I have some cheap ones that are "hub centric" but the bore is too big so it's hard to get them to not vibrate.
Yes, I ran them for several years and they are tight on the hub. They are really good for spacers. Obviously they don’t have their own hub for the wheel to locate on so using hub-centric wheels with the acorn nuts is a potential issue. the issue can be mitigated with cone-style lugs to center the wheel on the threads or use 3 cone lugs to center the wheel, install the 3 acorn lugs, then replace those 3 cones with 3 acorns.