My Antipodean Armour Fest relies on hybrid Chieftains, Challengers and Leos. German engines for the Chieftain, Challenger 1 and the Challenger II gets engine and gun. The Brit tanks equip the independent Tank Brigade, replacing Conqueror; while the Germans equip the Cavalry and Armoured Infantry, replacing the Comets and Centurions (USMC fare for the RAM though).