I just recently installed new vinyl windows with vinyl jambs. I am about to add the inside trim but some of the window jambs do not fit flush with the drywall because the jamb isn't deep enough. There is a .25" gap in some places. I think the stool will end up being solid wood and the casing and crown MDF. I'm going to paint it white to match the vinyl. The issue I'm going to end up having is this gap where the reveal is though. I tried to upload a photo but I was unable to. Thanks to anyone that can answer, hopefully you understand what I am talking about.