If you take your wood, overlap them just a little bit at the joint,making sure they are lined up and clamped, then take your router with any flush cut bit and cut through both pieces at the same time , now you have ends that are mirror images
I used finish nails and filled the holes before applying the finish. I think I would use a Doug Hodder trick and use screws with finish washer if I were to do it again.
Bruce
2009 6.5'X11' TTT - Boxcar All it takes is a speck of faith and a few kilowatts of sweat and grace. Boxcar Build aVANger Build