The coat hanger method is the way to go. I got the chance to ask the parts counter at the local dealership and after some research they concluded that the pin that you hang the trim onto is a single use part, so if you were to try to pull it out, you'd have to buy a replacement.I have a 2019 Hybrid EX-L. I did not remove the plugs behind the Airbag badges on the C pillar and, like you, struggled a little to replace the C pillar. I have removed my rear deck to do work three times now and I learned that you have to put it back on like you are hanging a coat on a coat hook. Place the C pillar over the white button like it will sit when in place, then slide it up the front of the white button and "hook it" onto the white button and slide it down the backside in place. You have to push up and against the headliner a little but it did not seem to damage it in any way nor leave any visible signs.