Glad to hear that you got it working with the Devo 7E.
I don't own a Graupner myself and I don't know any specifics about it - I would suggest checking in the manual of the transmitter itself. Or, checking on a Graupner specific forum, or, directly with the manufacturer.
If you can confidently fly FPV Freerider on the "Snappy2" preset (in Acro mode) without crashing, I'm pretty sure you will be able to fly your Tyro99 too.
Joshua Bardwell has made an excellent tutorial series that contain a lot of exercises which are good for both beginners and more advanced pilots.
Sorry for my late reply, I somehow missed your message.