Thanks for all of this guys, great help. I removed my headliner without incident, have insulated and now am reinstalling. Having difficulties getting the headliner back in, as it flares out at the front so a bit wider there. It catches as you reinsert the headliner. Is there a trick to getting that wider part back in? it seems wider than the roof at that point. I dont want to break those front corners as I put them back in..