A couple of lil points, depending on whether or not this is intended as a 'realistic' armour, as opposed to a 'fantasy' style ? Oon the inside of the elbows - if that is supposed to be metal...there's no way the char would be able to bend his arms. On major bending sufaces - inside elbows, back of knees, armpits..most real armours had nothing at all. Protection for these areas was usually smallish mail sections ..sattached to the padded arming jacket that was worn under the armour to prevent chafing. My best hint is this..go to local library, have a good look at some books showing details of real-life armours. They will usually give a good idea of what armour really looks like in some of the smaller, but very vital details