Denis, that looks about right. It will make more sense when you actually rig it up. Here's one thing you could change to save you some string. The way you have the tack line rigged up it's 2-1 back to the halyard.
The tack line on the diagram is actually 1:1!
Thats a good system go with it. get the lines as short as practical then the sail can't possibly go in the water
