This thread got rerouted from helping me not make a pipe bomb to talking about wendys and OPENrocket
Nice job on getting the stability margins right. 2 calibers might make it
weathercock (point itself into the wind while in flight), but most commercial kits have similar stability margins and will do this anyway. Just think carefully about flying in high winds and you'll be fine.
Typically for safe flight you'll want 30mph or more off the rod, and your chosen B6-4 does that easily. The delay is appropriate too, a hair longer than optimal but as close as you'll get with commercially available motors.
Now all that's left is to make a few modifications so the rocket can be built with available components.
Take a look at some of the presets for body tubes, noses, and the like, and select ones that are available. You might be able to create them from raw materials if you consider yourself a skilled craftsman, but otherwise it's just easier to buy and modify if needed (body tubes can be cut to length, for example, and parachutes can be constructed from readily available materials like sheets of thin fabric or plastic).
Also be sure to install a launch lug and construct a motor mount (I can detail this in a subsequent post if desired, or you can play around with it if you prefer).
If you've still got good stability margins and rod exit speeds after all this, you're ready to start building, which is another challenge unto itself. You'll need to select an appropriate glue, install all parts correctly and with a degree of precision, then select and apply a color scheme that allows it to be seen against the sky, the ground, or a tree in which it will inevitably land.
If you do all of that, you'll have a rocket that is almost certain to be cleared for flight and stands a good chance of intact recovery.
If that sounds like a lot, it kind of is, but it also presents a mountain of learning opportunities with minimal risk of explosive injury. Now you see why most of us focus on designing and building airframes and not motors!
Your kit will serve you well, but I'd encourage you to take what you learned from it and apply it to your scratch build when you feel ready. Very little is more rewarding than seeing your own design work.