I feel for you, many of us, me included, have already made these mistakes, we know what happens with our subject matter and our techniques and our tools. For me 4 over is an oh well got a little extra grain moment, 4 under though, now that gets me grumpy.

There are lots of variables here, the only real way to see what you're going to end up being acceptable given your subject matter, using your techniques and your tools, is to test.