does anyone know if the RUNSTONE MASTER'S perks override and negate the runestones and glyphs that are on the equipment? e.g. you have a sword with bleeding runestones and then he applies the whirl perk... does the bleeding perks go away?
Either your previous rune was destroyed, or you had to remove it before you could add those master runes. I could place a bet to that last option, but I'm not sure. It has been a while since I toyed with those runes.
Yes, you can. It just has to have 3 rune slots (whether empty or filled doesn't matter). You will need runes required for an enchantment of your choice, naturally. All previous effects from runestones (if you had any) will be removed upon enchanting it with a runeword.