This Mercury, was quite funny that the 4 absorbers are nearly 90 deg upright and was short wheelbase design. The eccentric diff. holders are used to adjust the belt tension. Chassis gets overheated easily when using hot motor. One more interesting thing is....it was copied by a Korean factory , maybe Academy, not sure. (don't know if it was actually sold from Mugen). Very short product life in those days. Good caught!