You won’t find an rv window that opens past 1/2 way. That’s just how they are. Then again, probably enough. I splurged and bought used X doors for waaay too much money, but sitting in the truck with my window down it is comfortable to rest my elbow on the sill so that’s something. But I wouldn’t mind the small slider either. I found some of them on amazon that seemed like the ones they are using.