DIY - Replacing a wood window sash - Make a new sash yourself 

Impressive! Your glazier friend was amazing to watch.

This is awesome! I love both the concept and the visual appearance of old-fashioned, hand-made windows. in my town there's an arts organization that is slowly renovating and moving into an 1870 grain-storage building, and I am about to start volunteering to help. It has nine original 2-over-2 single-hung windows with meeting rails that are seriously warped and have pulled away from the glass, leaving gaps. Right now they are just covered up inside because the organization cannot afford new windows. I am looking into the possibility of building new ones for them.

Well done, just what I was looking for.

you did great job my mother in law just been quoted 5000£ for 4 windows and a door !!! small windows at that 5x4

Nice job! Looks great. And very clever. Not so sure that I'd bed the glass with silicone however....

nothing could be simpler

No haunch in the mortice?