I don't want to high jack this thread so you folks go on to answer his questions but the pictures reminded me of something...

The large orange stoneflies that are imitated ...e.i. the Pteronarcys californica...actually have a brownish body with definite stripe of orange segmenting the body....I would suggest a brown foam with orange thread....

Jude, no criticism of you intended...in fact, those are great ties and it helps me to know that a commercial tyer will struggle with such things....I don't feel quite so inadequate ....it is how this fly is almost always presented....do I know if it makes any difference to the fish....I don't.