Luggage rack on a carbon road bike. (Tailfin alternative)

For a multi-day tour with my Canyon Endurace CF 7 AXS, I thought about how to transport my luggage.
I decided on a luggage rack, but Tailfin was too expensive. I therefore ordered a Tubus Fly Edelstahl.
To do this, I replaced the Canyon thru axle with one with a continuous opening (142 * 12 mm thru axle and 1.0 thread pitch from Amazon/ebay)
Then the Tubus quick release set could be used. I ordered the Tailfin Seat Post Connector to attach it to the seat post.
As a bag I use the Ortlieb SPORT-ROLLER PLUS 14.5 L, which I liked better than the Ortlieb GRAVEL – PACK and they are even lighter.

The solution is very stable and nothing rattles and is mounted in a minute.

Pictures:
https://imgur.com/a/LMbtDnJ