Flame-thrower Sappers:
Spawn with no flame-thrower (3 rifles and 1 guy empty handed) with the unit description "M3 'Quad' Half-track".
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Tank Repairs:
Tank repairs become available to use when damaged, but cannot be activated (Due to a missing requirement?). I thought initially this was just RE Churchills, but it turns out my CCT couldn't repair either.
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Hope the screen-shots help give clues, let me know if you need any more info guys.