Ok, I’ve been putting this off for far too long. We’ve got a great leaded window in our front door. It’s suffered over the years with door opening & closing & needs fixing. I’ll make a replacement window to fill the gap while I get my head round what needs doing and, more importantly, how to do it. I’ve got the lead came, got the glass, got my glass cutter, got my ancient soldering iron. Just need some brains. This may take a while.