I remember that they laid the groundwork in the sheetmetal shop, for the Fokker DXXI replica, and had a Finnish frame as the template. This was in 1986. Also the old revetments on a old taxi track are still visible on the public road just outside the base on the Schaarsbergen side.
Also the huge Diogenes bunker is still there, in use as a govermental depot and archive, i think they have the national archive from mental diseases hospitals there.