For me a trench coat is all about the details. There's just so much stuff going on! Epaulettes, storm flaps, belt loops here and there. Maybe one of the reasons I've delayed making the coat is all of these details, which are usually topstitched to the Nth degree. In my opinion if they're not done well, the whole coat looks like crap. I'm using my Singer 301 which does a fine job of straight stitching, but I really struggle with edgestitching. So I'm going to forego the double topstitching and will just topstitch everything at 1/4". Call this playing it safe ( and knowing my limitations).
Here is the final result.