Exactly what I do!! I take the exchangeable bit driver with the orange handle, pull the bit out and the thin walls of the shaft slide right down over the nut. 1/4" socket is too thick. Give it a try, @mackyWesterly truss rods used a 1/4" nut... so unless it was replaced (or is one of those Guild off-spec things that happen), 1/4" is what is SHOULD be. I use a 1/4" exchangeable bit screw driver with the bit removed to adjust the rods on my Guilds... fits down into the hole better than my 1/4" socket driver.