Hello @ed_hall ...
I have been reviewing older questions here in the Canvas Community, and I stumbled upon your question. It's been almost four months since there's been any new activity in this particular topic. While I don't necessarily have an answer for you myself, I wanted to check in with you to see if you are still needing help with this question...or if the information that @kona provided helped to answer your question. If you feel that Kona's response has helped to answer your question, please feel free to mark her reply as "Correct". However, if you are still looking for some help with this question, please let Community members know by posting an update below. I'm going to mark your question as "Assumed Answered" because we've not seen any new activity in this topic since January 20, 2018. However, that won't prevent you or others from posting additional questions and/or comments below that are related to this topic. I hope that is alright with you, Ed. Looking forward to hearing back from you soon.