Tamiya has marketed several updated version of the Blackfoot. The Super Blackfoot was based on the same basic space frame chassis, with the most important improvements being a better gearbox and double wishbone rear suspension with dogbone driveshafts instead of the original's vulnerable and quickly wearing ORV-type gearbox, trailing arm suspension and hex type drive shafts and sockets. The body was basically the same as that of the Blackfoot, but with a different grill design and new decals. Later, the Super Blackfoot was replaced by the King Blackfoot, this time with an improved front suspension with longer suspension arms. The styrene body for the King Blackfoot was still clearly derived from a Ford design, but no longer identified as being a Ford by Tamiya and a totally new development. Tamiya currently (2005) markets a completely updated model called the "Blackfoot Xtreme." The "Xtreme" has a totally different chassis design than previous versions, but retains the body of the King Blackfoot, just mildly modified with a hood scoop, a modernized grill and new decals. The BX is the final incarnation of the Blackfoot name. The "Xtreme" can even be modified for 4WD with the addition of a front gearbox and a second motor. As a matter of fact, Tamiya markets the 4WD "Wild Dagger", 4WD "Twin Detonator", and the 4WD "Double Blaze" all based on the same basic chassis as the "Xtreme".