Here are the completed R2 scenes, in terms of visual effects:
https://mega.nz/#!rA9WDLjQ!i1aY0t-68yiD4ChTIsFQ92nUGL0MS-XSFviMahk1Hm0
https://mega.nz/#!7cVi1KaK!0rmqh2VDN1BY5Up89ymeQ8vhqzccdaDHi3NlMV7V0KA
And here are the sound effects only stereo tracks:
https://mega.nz/#!LUtHDbiC!RwJU5u4EcLS0m196H-eYsBW9vJCe0A2HmwsuJAx1lm4
https://mega.nz/#!DY82yboL!vuaIgnxFM7nnpmf9dj0ILHJcvrHJlOefmFxElLCKEYM
A final sound mix would need to include the sound of C-3PO walking away and BB8 sound effects, in addition to the soundtrack finessing.