RE: Goldberg Matrix
That is many things,
In example:
Fire wall was lost almost all back layout of plywood ( seems like bad drilling holes for tank output and engine mount), plywood plate for landing gears was cracked at the middle along fuselage line on two parts, holes between fuselage balsa cover and ( I am not sure how that called probably) frames and ……
So the plane was look like crashed and not completely fixed.