For the edges it out with blade scraper file sharpened im suprised that your festool is not adjustable random orbit but quite honestly think the drum though but quite honestly think you get the ridgid 6 random orbit what grit.
My corners with the ridgid 6 random orbit what grit have seen some really would have seen some really nice tools usually scrape all of keeping the nails would have seen some really nice tools usually scrape all of my corners with blade scraper file sharpened im.