Yeah, if I knew what I was specifically going up into the inner roof for, I'd probably leave it in place. However, I want to remove it to aid in troubleshooting over time (plus time for parts delays, installation, and extended testing). So, I'm expecting the headliner to be out, once I get it out, for a few months at a minimum. I just looked through some old pics I took from my dash cam install (see dash cam thread), since the rake on the windshield and rear glass is so long (making the headliner fairly short in comparison to the interior's length), I think there may be enough room with the front seats out of the way to twist it and get it out the driver's side rear door (dropping it down on the passenger's side to avoid the steering wheel and column). And, I didn't see anything attached to the headliner itself (so, I must've confused that from memories of my Pilot's headliner which does have harnesses and hoses attached to the headliner) which means this will likely be a slightly easier job once I can get started on it.