I have some good experience working and editing default airports.
But when it comes to Cairo HECA airport (one of the premium package airport)
I always face a very strange problem.
The default pitch for glideslope for ILS 05C always lands the plane at the end of the runway and too high.
Tried editing the glideslope pitch (witch works with all airports) changed it from 3 to even 1.5 degrees but has no effect at all, the plane still comes too high.
I even tried changing the glideslope location and nothing.
It seems like the glideslope information is overwritten by other file.