I ran the M91T H/L on a MD2 with 18650 last night to take my Mrs. out to dinner and a ballgame and I think it did well. It is not as awesome as on the MD3 body and its not as bright as the M61HOT was but it still had a very useable low. I think this will work for the times I just don't want a MD3 in my pocket.
Thanks @thermal guy for the suggestion.
Thanks @thermal guy for the suggestion.