I think button covers are great but I also think they make it easier to push too hard thereby weakening the firing pin. It doesn't take much to fire and I'm a self-proclaimed button masher.
I just had my firing pin replaced and that was a long week waiting for it to come home. So I bought a Woodvil mini in the classies and I'm waiting to get a Grand when the new 510 connections are released.
I won't be caught without a working Reo again. Hope Iris makes it home soon.