IMHO the obvious flaw in the H2 is that the pizza will be out of round and squished to one end of the box delivered in that setup.
You will not get laid or a tip delivering a defective pie.
An older Rocket III will keep the box horizontal and keep the contents intact with properly controlled launches and stops. This will be easier than with a newer R3 model as it has less torque.
I did a successful proof of concept test last night.
Now I need to apply for a pizza-boy delivery job in a market catering to middle-aged women in the burbs here to earn some moola to pay for my recent repairs.