 That high-frequency vibration caused chassis welds and transaxle mounts to fracture.The steel chassis tubes themselves were of a thinner gauge than the 12's, sacrificing strength in Chapman's quest for weight-saving.However, the handling of the car was badly compromised by the unequal weight distribution which resulted from the engine positioning, and the 16 had to be reworked to accept its engine in a more conventional, albeit obliquely aligned, central location.