I love drafting pens - I do 'fun' drawings with them, mostly, with watercolour over.

Lots of talent here, for sure!

To Elmer - thanks for the thread: I love seeing other people's work. And, since you mentioned it, the short version of how the glass painting is done: same techniques since the 12th century, metal oxide pigments, frit, flux; coat glass, remove what isn't wanted with dry brush, needles, etc., fire in kiln 1050F to 1250F depending on pigment as many times as you have paint layers. More to it, of course, but that's the essence.