thanks for the 3 aircraft 
.....I could fly them only after deleting the mos file included in one of the models. It had a funny name starting with tototo and I thought I could repair it by correcting the name. But that didn't work so I deleted the file.
I have no idea how to repair the mos file (?)
can it be done or can I use a mos file from another p51-model?

.....I could fly them only after deleting the mos file included in one of the models. It had a funny name starting with tototo and I thought I could repair it by correcting the name. But that didn't work so I deleted the file.
I have no idea how to repair the mos file (?)
can it be done or can I use a mos file from another p51-model?