I’ve got the ball rolling, just waiting on a quote for A0 size which should workout at 65cm span. Single Cardboard sheets from Amazon small pack of 5 although other thicknesses are available.
Digging even deeper in the workshop, I found these props which will require reaming out to size. They are 6X4.5 I think the’ll not draw a higher current than the stock Dji which are 8X3.3, will see.
Ah yes, the wings bent upwards… I thought for a while that was normal, but yes the slots will cause that.
Also look at using gaffer tape on the top of the ailerons as hinges. Simpler and probably promotes airflow better than the way you had it. It’s what my now destroyed 3d printed plane had and works pretty well.
I printed it a couple of months ago. There are posts about it. It was about time it got its maiden flight.
My first fixed wing with predictable results.