@RayR posted:Ok, can you identify the control boards, and/or direct me to website where these can be obtained?
See my post above from 15 April 2020.
If you don't do eBay or would rather not wait for shipping from Asia, there are several sellers on Amazon for a bit more coin but presumably you'd get them faster. For example,
For sizing the 12V DC-output adapter, plan 1 Watt for each dual-relay module. I believe you have something like a dozen total blocks in your two loops so that would be, say, 12 Watts. Thus a 24 Watts (12V x 2A) DC-adapter does the job.