Got it sorted. The autopilot A,B,AB switch has to be in the A or B position. Captain Sim moved it to AB for the new version 2.6 and I didn't catch it. (I read the post about it, just didn't register until now.)  So, two independent civa's can work.
This was just a test. Two cdu's pull the frame rates down. Sticking with one is probably the best choice. However, I would like to see the 3d cdu's integrated into the panel like the L-1011.

This is a single cdu version:

[Window0X]
Background_color=0,0,0
size_mm=180,328
window_size_ratio=1.000 
position=8
visible=0
ident=11041
type=special

gauge00=../civa/INS!Cdu1,  0,138,180,190
gauge01=../civa/INS!Msu1,  0,70,180,68
gauge02=../civa/INS!NavModeSingle,  145,0,35,70
//ins bottom right

I have extra time this week to mess with stuff. Captain Sim's v2.6 ins works fine. I just wanted to understand the ins thing a little better. Again, this is just the stock v1.51.