I did this successfully twice, out of about 5 attempts, so use caution.
I found the best way to do it is to find a bolt that threads into the star nut. Thread that in part way and use that to keep the star nut straight during installation. I used a couple of hits without the bolt to get it started, then straightened it up using the bolt, then continued tapping it in using a small screwdriver and kept moving around the star nut.
Good Luck
BTW, if you decide to take into the shop, the whole process shouldn't take more than a minute to do. Bring the mechanic a soda and see if you do it for you "Gratis".
L8R
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