Great! Thank you they were great fun to make. And thank you for your in depth answer! Yes I was thinking about the bottom rail being flat and that if water gets in there, it would just sit. Do I absolutely need to cap it aswell or could i just drill a few holes?
and regards to drip rail on the windows.. the cill underneath which is also wood have just a grove routed in along to stop the water getting to the wall. could I do similar on the window frame? Or should it sit “externally” on the outside frame face?
And I’m not sure I completely understand if you could use soudal like a linseed putty replacement and have pins/push points(??) to hold the glass, the way you would with single glass or it really needs to be wooden beading externally to hold it in? (units goes in from the exterior)