I'm sure there's a link, when you change one the other changes too.  I took a look at the XML implementing the Civa (civa.cab) and there's quite a few variables that don't seem to originate in the code, but are read.

I strongly suspect they are calculated in the panel code.

I think with enough effort you could get it untangled from the L-1011, maybe, but it's hard to justify that level of effort when the old CIVA works ok. 

Except for the great way CS integrated it to read the FS flightplan and automatically switch "pages" when you have more than 9 waypoints.  Those two changes make the whole thing much less painful to deal with!

Dutch