It doesn't take lot to be slated on here, you should only take the positive on board and ignore the rest, or tell them to go and fuck themselves, whilst the former is a wiser move, the latter is more satisfying. My input is, there's no harm in trying but I think you should put it together yourself and ask for input on possible changes to be made once you've finished. I don't think a collaboration on a forum will work unless you gather those who are interested and work on it between you.