It's always nice to welcome a fellow Brit, Paul.
Can you trace the lineage of your tetras very far?
I think it's a great idea that we keep future breedings as 'unrelated' as possible.... but it will be difficult to get some people on board.
I'm up for it though. I think part of the problem is the surfeit of males..... I have a trio, one of which is female. They were already attempting to mate prior to brumation, so I'm hoping for a fruitful year..... but I'd be quite happy to exchange one of my males for a more distantly related male, if that can be figured out.