I recently finished soldering this A4000 replica board. It took me several months to do, as I could only do it in my spare time. Also, prior to a year ago, I had never even picked up a soldering iron. It works fine with the 3640 CPU card, but this past weekend, I soldered in an onboard 030 in QFP package, so it will now also boot without a CPU board. This weekend, I will be building a new daughterboard, then, once I source all the parts for it, I will build a 3660.'