Sounds like you've got it right. Mine grow to a diameter of about 6 foot,leaves like rhubarb and about 30 courgettes per plant. I only cut the lower leaves off that are touching the ground,they seem to harbour white/carrot flies and rot quite quickly.
When you get sick of courgettes you could harvest the flowers,dip in tempura batter and deep fry for a few minutes or I think there's something in the recipe section called Courgetti Spaghetti!!! ......Ree