and i thought 10mhz was to high :<

Dot clock = 15.6672 MHz

Dot = 63.83 ns

Full line = 49.93 µs

Line rate = 22.25 kHz

Full frame = 16.626 ms

Frame rate = 60.15 Hz

if it was me i would use the analog video as 640x480 fine (but i would want to turn off the color carrier and just have luminance if possible)

http://home.earthlink.net/~gamba2/images/plus_analog.PDF

i think removing the u2 buffer and making R27 bigger say 1k or a pot, "page 1"

and add a lm1881 to do the hoz and vert pluse's