I have this print for a small motor housing. I've finally got the program tweeked so I get fairly good prints but this one is perplexing me. It will print just fine up to the layer in question, (see photo). It prints the support structure just fine, and every layer after this one prints good as well. My question is, is there a selection, or technique that I'm missing here that will get this one layer to print better? I wouldn't be concerned but it is a visible face.