Hi mjcdl

I think your beard looks really good. I do agree with dropping the neckline a bit lower though.
Someone told me the best way to carve a neckline is to look straight out infront of you. Anything that points straight forward must go and everything that points down to the ground must stay. In other words that would be exactly down to the fold as you said.

The experts can correct me if they don't agree but this is the way I've done it and it works for me.