If a table is 2" in depth, would it be foolish to install a half inch depth key into the mortise? We are using the keys to prevent the splits in the tabletops from further splitting in the future. We are routing out the mortise with a plunge router (using a key template) first and then using the template to cut out the key to stick into the mortise with a rubber malet. The bit we have cuts half inch depth. I was thinking it would be stronger to have a key at least one inch deep.