The plexi seems to form a air pocket and then the doors do not close as well with the springs. We have 2 springs, without plexi, the door shuts like a dream. With plexi, it now pulls too, but does not go into the little latch. We now have to give a slight tug or push to get the latches to engage. Al said it might latch with more springs, but we have not gone there yet, he is hesitating for now.
Air pocket is not the best description, but at the moment my ole brain cells will not kick out a better one!