I noticed the difference in nut size, but figured that just leaves more room for adjustment! With the detail we put into paint and and assembly (a lot more than Standard did originally), I figure it'll be many decades before the bolts lock in the nuts from corrosion, and we have any possibility of spinning them in the cage.
Also, on all my cars, every time I do an oil change and tire rotation I also look over the undercarriage and hit any spots that show a hint of corrosion with LPS3. LPS3 leaves a wax-like film that protects everything under it. I learned about it from the aviation industry...and it works just as great for cars. I have never had an issue removing bolts that I treated with LPS3.