cutting out a cockpit in FSDS

[Wing Nut]

Ok, so I want to cut out a cockpit, to place my readymade part into (I made the cockpit as a separate model) but I can't figure out how.  Obviously, I need to make certain polygons extrude into the fuselage, but how do I do that?  No luck with the help on that one...  ::)

[Wing Nut]

Apparently, fsds and I have a different definition of extrude.  What they call extrude, I would call extend.  I have no idea what they call what I want...

[Ambassador]

In Gmax you can extrude inward by entering a negative value into the extrude box.

[Felix/FFDS]

In Fsds you extrude from a created template.

To accomplish the same thing, you create a copy of the part and flip all polygons, then scale it slightly "inwards."

The tedious part is creating the 'filler' polygons.

Felix