I have 2x6 ipe for the rail cap but it's in 10' lengths. I was thinking it might be better to terminate it at a post evry 5' or so because I doubt I could joint it decently to appear continous. But if I do, it's obviously wider than the 4x4 posts. That's gonna look stupid. Any thoughts? Speaking of posts, I keep reading that they must never be notched due to weakness. If the notch faces outward to the rim, does that seriously weaken it? I could see if the notch was facing in toward the deck but... I don't know.