At the FCUG meeting, the U64 was tested with a Koalapad and its Koalapainter cartridge. The U64 failed! It understood when the stylus was pressed against the tablet, but it would not move the cursor lower than midpoint down the screen.

More testing to be done...
With the board fitted into a brown C64 case, I don't like that it's only supported by 3 screws. Therefore, I have taken member Bogdan's advice and have ordered 3-D printed brackets which will firmly hold onto the U64. I got them from CoreI64, specifically on this page -
https://corei64.com/shop/index.php?route=product/category&path=65_66 Truly,
Robert Bernardo
April 27-28 Commodore Los Angeles Super Show -
http://www.portcommodore.com/class June 8-9 Pacific Commodore Expo NW -
http://www.portcommodore.com/pacommex