I didn't need to know what you " wanted it for! ". I jumped to no conclusions. I'm calmly sitting here, seeing that you simply know shit about Chain Sets.
Sorry. But, there it is. You don't know what they should involve. Thus you're prepared to grab at what ever commercial crap is flashed at you. If you had a clue? You'd simply buy the component bits and knock up superb, tailored rigs.
Instead, you get all snappy and yappy at a man you don't know from Adam and thrust on about buying bits and pieces. You've already tried two waste of time set ups. Now you'll blindly go for a third?