All good ideas, you may want to cut 80 ft of chain off and use 40 attached to your rope rode however. C Dory's don't need all chain rode as some big boats use.
Retrieving even 60-80 ft of chain without a windlass is no fun
Our windlass is one of the top 1 or 2 items we put aboard.
Forget what you read in boating books about 7-1 scope it is rarely possible in today's crowded anchorages. Go a size bigger on your anchor (or two sizes) and relax with 3-1 ( or less)
We run the 22 b Claw by Lewmar and are on short scope unless it's blowing hard, having sat thru a steady breeze of 45 knots a couple times, we know it's the right gear for us.
Our rode is not marked, I gauge the angle as it goes into the water as "about right" having cruised and lived aboard a while now I am confident in the gear I put in the water. The markings I've seen used are another thing needing maintenance and likely overkill for our wee boats
George