Put together the boxes for the windows along the front of the shed today, which was relatively simple. The windows themselves are going to ‘float’ in the wall, sitting on top of (probably) three courses of bales, so the basic frame itself just needs a ‘plate’ on the top and bottom so I can strap it to the top & bottom plates:
The crossbars on the plates are weirdly offset because they line up with the existing cross-pieces on the bottom plate.