The front porch /gate project

I have finally closed in on a rough idea to replace my porch railing.  In learning to make a new mortise joint and seeing an example used on a gate.  I am almost finished with the initial drawing mock ups.  I have some 30 year old deck redwood 2x6 lumber that is in a pile in back that will begin to be milled in the next few weeks.  I hope to get this out of the way before  knee surgery happens in the next month.  I still will be able to work on the gate/ railing while I am down, but I sure think that it is going to be difficult.  Here is a pile of old decking redwood in the photo at the side.