Been a long time since I have posted on Keebtalk, I hope I am not making any mistakes on this post!
Timestamp: https://imgur.com/a/QrpQoPZ
More photos & angles: https://imgur.com/a/BVpKVza
Typing Test: Yui660c Wedge Bottom v2 Prototype Typing Test 1.11.2021 - YouTube
Prototype discussion video (same unit): https://www.youtube.com/watch?v=Cy90Mu2DsE8&t
Price: 300 USD with shipping internationally [reduced price update]
Details: Angled case for the Leopold Fc660c (topre). Made from aluminum (aluminum is raw with no surface finishing or coating). Angle is 4 degrees. Case includes extras as can be seen within the timestamp photos. Please let me know any other questions you may have!!