Pete,
you may scale down a model with an external scale program.
It does not work for the AFPD TGO file format, but for the elder AFP OBJ file format.
So check to download an Extra for AFP to get that format.
Find a workshop for scaling here:
http://www.rodeo.rc-sim.de/workshops/scaleAFPmodels.pdf
Regards
Karl-Heinz (Rodeo)
www.rodeo.onlinehome.de