Testing FG

I'm sure this has been covered many times, but wasn't sure how to search for it.

I did my initial gravity test when the brew was just mixed and quite warm, around 80°. I have cooled the batch down (hopefully not too late) to around 69°.

Is the gravity comparison on the finished brew going to be fairly accurate? I read here that you should do them both at around 70°. Will the 10 degrees difference in temp throw the reading off by much?

All your answers can be obtained here, and a little extra.
http://www.howtobrew.com/appendices/appendixA.html

Fantastic!

Thanks!

My pleasure, hope the brew turns out good for you.