Trixy

I've setteled on relays.  I've cracked how to do registers.  Now to make a scematic and some pcbs.  No surprises... I'm gonna make paired latches the cost is 2 relays 2 diodes per trit.plus some...

But what will it be made from?  Relays, dg 403's, or more basic parts, like transitors and diodes... I'm leaning towards relays, but then I saw another project here building from diodes and transitors.  Hmm first design decision...