Yeah I position mine directly over the inner circle. :)

And thank you! It always surprises me that there isn't more information about casting, because it's dead easy... but maybe people just don't know how / and books don't publish pictures about it. But hehehe, I had so much fun taking the pictures. Lol. I don't care if it highlights how 'non-fancy' my materials are.

I'd like to break down a 'how to read a casting' one, it'd need to be multiple entries though I think. Reading can be quite complex.