collins made mongoose under licence from blueflame iirc,
the collins ones were slip joint type connections whereas the blueflames had flanged connections like the jap stuff which makes them much easier to line up and they dont wander and catch on teh front prop as easy as the slip jopint ones,
i had mongoose on both my 4x4 saph and escos though , was very happy with both, in terms of fit, looks and sound.