I bought this set of 10.4 volt litium battery tool set, an offer I could not resist. This set is perfect for a project like this. Drills are more than strong enough for the work needed and the cutter is very good. I used to borrow a Fein cutter but this one is more handy with no cord, although a bit thirsty. From left to right: cutter (and triangel sander) adjustable angle screwdriver, impact screwdriver, drill, LED lamp
Using a bicycle spoke to mark position of cockpit floor. It is long enough to make the mark vertical and easy to push through the foam.
View from inside.