Thank you for your tweet reply and kind offer of the updated SM source-code, either option is much appreciated so which ever suits you best (my email above).

I’m currently trying to create named singleton instances for multiple configurations in a multi-tenant architecture, returning an instance based on the current configuration (indicated via HTTPContext) and your pattern looked like an interesting opener to solving it neatly in SM 2.6+.

Thanks again for the kind offer of code

Ian