Not at all Ed, you have done more extensive research on these topics and subject matter than anyone else I have seen, and I've been at this a while
You have experienced some of these kinds of connections that reflect the potential for these early traditions extending into modern times (1960s etc) with high ranking officials in Egyptian and Sudanese cultural conventions.
The Ottomans were keenly aware of diplomatic channels and this kind of networking between fraternal and theological elements seems quite reasonable. While complex, there are likely more distinct answers ahead, but for now this idea seems a good potential explanation.
Meanwhile, Pieje I think you have a sound kaskara example with a potentially significant blade. Thank you for sharing it here.
All best regards
Jim