This one went through a long and torturous build process over almost two years. All I can say is don't believe the "advice" you find on talk_ass. However, in the end, it turned out to be a pretty nice instrument.
All the little bits and bobs that I used to order cheap from China have become much harder to get. eBay is a shadow of what it was just a year ago, there is not nearly as much cheap loothery supplies. But even if you find something, half the time it just disappears in shipping. Or at least it seems to disappear in shipping - a lot of tracking numbers from China are completely imaginary. As soon as you order something, they issue a tracking number to lock it in. That doesn't mean it shipped, or that it ever will! Fortunately, eBay makes it pretty easy to get your money back from such scammers.