It's not very hard. I just take 2 of the nuts, thread them onto the stud and tighten them against each other. Grab the bottom one and loosen and ideally it will come out. To put them in just do the opposite. Now last time I did it I used an impact drill, worked AMAZINGLY well and was soooo much easier. Do NOT use loctite, these things are a big enough PITA to get out w/o loctite.