Hey dude, I didn't realize that was you writing, yeah man, your C42's will fit great in there. It's a tight fit but don't worry...I asked David Josephson if it was normal to fit that tight and he said yes. I was also worried about marking the mics but he said no worries, you can't hurt 'em, just pinch the mount open a bit and slide them in (xlr end first).
Good luck with them and let me know how it goes!