Very happy with the new rain fly. Fits like a glove. Since my flip pac is the old style with fasteners on the back, just fit the fly over the lid and popped it open. Went on smoothly. As I wasn't real sure how to do the battan's I left them off. Once the fly was on I figured where the vent battan went. Next time I'll put them on first. Worse problem was folding it up and getting it back in the bag. Thanks to all that gave me suggestions. Now I know what I'm dealing with. Pictures attached.