Looked at your code: looks very much like mine :-) I suppose it's a good thing since the mantra of opinionated Rails means just that: "stay on it". I saw your

Looked at your code: looks very much like mine :-) I suppose it's a good thing since the mantra of opinionated Rails means just that: "stay on it". I saw your confusing comments for non-working Fueling validate(). Why don't you just check for nil there? It's always nil for 1st time users, no?