There seems to be a different philosophy between Europe and the US. In Europe, the modeling community seems to want to have every little detail and everything opened up. In the US we tend to add detail but not in every single little access panel.
This set is designed to allow you to open EVERY single access panel on the Spitfire. The instructions show you how. It is up to the modeler to decide which ones to open. There is no panel that is left undone.
There are templates to help remove the plastic panels on the kit. There is a new cockpit access hatch and a radio access panel. Some, but not all, access panels have detail on the inside so when the panel is posed open whatever is inside can be seen.
Eduard also provides teardrop templates so you can use heated plastic and make new light bulbs. They are in various scales.