I would very much love to learn your recolouring and blending techniques, i've asked Jehannum about it but he never bothered to create one. Maybe in the future if you're doing a shoop with similar techniques? Thanks in advance!
Also regarding the lip-synch: big wave rider just posted a tutorial, use the technique in the tutorial, but instead of parenting scale to the audio keyframes like in the tutorial, parent X or Y position instead and this way you would have movement of the mouth corresponding to audio amplitude. I made a video with that technique but it's got a very heavy Nazi theme so I can't post it in public