All resources are of interest - I don't think that advert was included in the thread on recreating the Softy 1 - if this sort of thing interests you worth reading:
https://www.vintage-radio.net/forum/...d.php?t=167741
I have one of Chris' boards but, I have not had a chance to build it as yet - I am also not sure he has finalized the PSU design so I am not rushing. It is a race between him and Ian who is recreating the native 2708 programmer for the Triton. I am actually writing extra 8080 code for it at the moment to do things like Blank Check, Read and Compare as the Monitor has only Zap (Program)..