Rear headliner w/ rear A/C vents

[natetech]

Anyone have any photos of a rear headliner down in a NBS that has a rear vent system for rear air/heat?

Need to drop mine ('04 GMC Yukon SLT) to drill holes in the roof for communications radio antennas, but a little nervous about the vents.

Have dropped every other vehicle's headliner to do this job, but never one with in-roof ducting and vents.

Any tips? How are they attached?

 

[OmarR]

 

[Red_Raider]

Saw a buddy of mine try it once on his 02. Needless to say we struggled a little bit, but it done with trial and error. It would be easier if you have someone helping(holding) you.