With that centre-section flying free as a bird now on the garage floor, we've raised the sheet alloy and using the pencil-marked margins lined it us as-good-as with the four arms. At this stage we apply a length of masking tape to mark where these cantilevers will need to be drilled, and at the same time numbered them viz. a viz. where they are going to end up on the 'drone. Handily, the film backing on the sheet metal includes an arrow that we can use here to remind us of which way we will be headed.
It does not really matter whether the airframe is going to be flying 'left foot forward' or whether you're what the snowboarders call a 'goofy rider'. At the end of the day it is down to whatever floats your boat... or drone. Note that both the cantilever arms and the sheet-alloy are numbered up.
