Lots of us have replaced the Trimark locks. No big problem if you are inside and can get to the screws, if not, yes, you hve a problem. That is why most of us leave one window unlocked, not always the same one, and there are some of us that have actually crawled through to the inside. And yes, the new replacements are a lot better. Only problem is that the lock cannot be removed if the door is closed, due to the locking pins into the latch plate. There is a way to get past that problem, but too much to detail here unless someone needs to know. Been there, done that twice!