Due to terminal health problems, I am no longer able to further (re)develop het RME hdspe driver I started about a year ago. If anyone would love to take over, please drop me a message. I will transfer the github repositories (https://github.com/philippebekaert) to you, pass on all documentation I have, and bring you in contact with the people at RME I have been working together.
Let me know.
Best,
Philippe.