I did several pieces for that collab and even some textures. It was about 90% done, as far as the modeling, but only 10% done as far as UV maps and textures. Nobody wanted to do the grunt work.
If you want to do a collab, here is how to actually make it work:
1) Actually *host* the project somewhere, like Github. Don't just use threads on /3/ because they will always go to shit over time.
2) One person is the moderator of the project. It's his call whether or not someone's contribution is accepted. If it's trash, it doesn't make the cut.
3) Come to /3/ once in a while to show progress and drum up more support, but don't spam 10 threads per day. /3/ is slow enough that a thread will stay here for weeks.
That's it. It doesn't need to be complicated, but you need to do this minimum amount of setup before starting the collab or it will end exactly the same way as every other collab on /3/.