GitHub instructions should probably have a photograph for step 4, attaching the ground pins. I figured out what he is talking about (basically an additional two header pins need to be installed to connect to ground), but the pins did not seem to be included in the kit. This is kind of important for durability reasons (as well as linking the digital ground on the C64VE to power ground on the C64).
I finally tracked down the last issue with my setup, and all I can say is: WOW.
This is exactly the fix that I’ve been looking for.
No jailbars, no color bleeding, no noise at all on the display. Just a crisp 1:1 image on the TV.
It’s just too bad you’ll need a TV with component inputs (which are becoming more and more scarce) or a Retrotink to hook it up to a modern display. The only way this could be better is if it had HDMI out.
My instructions on the github page talk about two 4-pin headers and either 4 single pins (for long board installation) or one 2-pin header (for short board installation). If these headers are not included in the kit, this would of course lead to some confustion.
I recommend to include the two 4-pin headers and additional headers for both options (one 2-pin and four 1-pin).
If cutting the headers is too much work, you also could include a longer pin strip for the users to break apart themselves.