Mondrian Inspired Design

So after 10 months of working with glass and wood I decided it was time to make my first window. Having no idea how to really make it fit inside a double glazed unit I am totally winging it!

I have found very few examples of how to make the stained glass panel to fit as triple glazed unit online or in books. The main glass design is complete, next cementing before fitting the Y shaped edging lead. This will form a tongue of lead which is sandwiched between two glass panels to form a double glazed unit.