New to plastering, I’m finished prepping an arch way for the plaster coats, but I’m realizing I may have messed up not using a corner bead, I got the corners looking nice and strait using joint compound and sanding. Aesthetically it looks good but I’m worried structurally I might have a problem due to not using corner beads. Do I need to attach the beads anyway to prevent problems, or can I go ahead with plastering coats since the corners looks strait anyway?