I think that the RMC doesn't really have a unique tank destroyer type unit. From what I remember, they use an M10 with a 17 pdr. main gun. Effective, but not super cool. The cromwell also is not unique or interesting as an all purpose tank. I think that the RMC would be a lot cooler with a replacement. An M3 Grant tank may be a cool unit that fills that role. Modeling may be an issue, but the end result would be worth it. The actual vehicle has a 75mm main gun a 37mm in the turret. That way, it has both anti infantry and anti-vehicular weapons. May be a unique tank type vehicle with a very interesting and new play style, depending on stats, and a perfect match for an RMC vehicle.