You'll have the too small hole problem. Sometimes, a small hole is better than a large one (in some cases) but not in this case.
You will either have to enlarge the existing hole to the 1/2" diameter (if you have a twist drill that size) or order one from me. They aren't on site yet but will be shortly. I'll offer the drill bits at cost to those who need them.
I've considered using Black Rock on my wife but after 30 years, I'm not at all sure it would do any good........