I just downloaded the first 70min and this is a really cool project! I love getting to the blu-ray deleted scenes reintergrated into the film and the b&w workprint aesthetic recreated. Are you still working on this? I would have opted to use some of the pics from the lost cut article http://www.starwarsholidayspecial.com/swcs/episode4/lostcut.html

and inserted them 'with missing scene' type title cards for a couple of seconds, e.g.

Also on the page i linked theres also a clip of an additional few seconds of low rez mos eisley footage from the holiday special, i wonder you considered plugging this in somehow (but sourcing a higer rez source):