We finally got the car seat and baby buggy (shower gift from my Mom.)
It's kind of a pain to install the base. It's one of those systems where the baby basket snaps into the car seat base, and also into the baby carriage.
We may end up buying a spare base to make it easier to use the baby carrier with both cars.
Anywhoo - it WAS really easy to level on the plywood battery box cover! I just set it in there - BOOM! LEVEL!
It amazes me how BIG the car seat is. I swear, it takes up more space in the back seat than I would! With it in there, you can NOT put the passenger seat all the way to its biggest leg-room position.
The seat sits very nice and flat. With the carriage bolts through the plywood and battery-box frame, everything is very solid.