No worries Wokks and Judders. As you would have seen though I managed the string through and it was my first time. I used that $30 drill guide thing and a heap of practice on scrap. If your really after a string through, I say go for it. just practice until you feel confident. My plan B was have a go before I did anything major...if i stuffed it, just plug the holes and paint it solid.

As it turns out i didn't need to.