Bob, I haven't mounted the hatches yet but am getting close. I'll likely 'glass some or all of the cockpit this weekend and the hatches are sitting in the staging room waiting their turn. Regarding the cleats, I wasn't clear where to put them. In the end, I contacted another builder and he gave me the specs:
14" outboard and parallel to the footwell sides. The cleat that runs forward is 11" outboard, leaving 3" between notches. The forward cleats should end at the centerboard trunk as the side ones do (or should).
This gives enough clearance for the hatches. You'll see in the photo you are clear to the transom. So as long as you know where you put them outboard of the footwell, you'll be OK.
Otherwise, I had no particular problems here. One thing I did a little differently is I only put cleats where they were needed. Meaning, I didn't span across the entire bulkhead 8 but cut them to fit from side-to-notch. Same thing at the transom; I didn't cut away any parts but sized the cleat to fit. It seemed to be a lot easier than scraping off epoxy. In hindsight, the only thing I'd do differently is to add at least 1/4" on the transom cleats that support the decking (you can do this by laminating or using a full 1" board). This will make it a bit sturdier and give the deck something stronger to sit on as it cures.