Dzus quarter turn fittings

Have bought myself some Dzus quarter turn fittings for the RG, should make fairing removal a bit quicker. They come in different sizes and at first sight these seem very big to the job. The cheapest place I found was a source on Ebay in the USA, www.desmoporsche.com it took about 10 days for my package to arrive from the USA.

I am not sure how I am going to fit them, but I will have to enlarge the current holes in the fairing and remove the female metal parts - that will be extremely dodgy as they are molded into the fibre glass, I will start drilling with a drill one size bigger than the current threaded parts, as I don't want them to rip out of the fibre glass, otherwise I could be looking at extensive fibre glass repairs....