Posted this on Facebook:
I will release the Eagle files. However I'd probably wait for MK3 instead of this one (MK2.5); it was made in a hurry when MK2 was badly designed so there are things that can be done smarter..Hey guys. Got back in the Atari community some months ago and I needed a vga-adapater. Started with the "normal" one. I really hated soldering the DIN13 connector. So did some thinking and came up with the following design. Plugs in to the Atari, audio and composite are avail from the RCAs and there is a jumper to route audio to both RCAs.
Still a little bulky, working on MK3.
(Oh, and all pins are broken out on the 14-pin header, two GNDs).
Eagle files: https://github.com/planeturban/ubeswitch