Vis Bellica, looks great. I game TTS in 28mm, normally on a 12 x 8 grid but occasionally managing a bigger battle. I've been thinking about dropping down to 15 or 10mm for some "cavalry heavy" armies (a) to reduce cost and (b) to give a different "look" to my units. My main period so far is pre-1066 so thinking of doing this for Middle Ages Eastern Europe/Middle East with say Mongols, Mamelukes, Ottomans and say Hungarians.