Hi there, Can only go my what our Group as been doing and 2 or 3 have made the stained glass windows, they say they are easy and I must say the affect if amazing.
Someone else tried out the attic window, made a small pincushion, super affect but she said that it was a bit fiddily, could have been the size that she was doing it in though.
Cordelia those are amazing stained glass panels you did and that site I have earmarked for ME Elle