I've just finished building my AstroEQ from Tom's PCB and pre-programmed chips.
I'm very pleased with the result so far, very neat in it's compact little Hammond case.
I sourced the remaining components from Farnell and CPC-Farnell and Ebay. I couldn't get it all from Farnell because some were out of stock and others had a minimum order quantity of 5.
It powered up OK with all the appropriate LEDs and was recognised by Win 10, so I'm now studying how to load the drivers and set up the software for my Synta 6v dual axis motors on my CG5 mount.