a thin walled body is deformed in a process in which the body is gripped securely in a holding station and , whilst gripped in the holding station , tooling engages to deform the peripheral wall of the body at a predetermined wall zone . the tooling is provided at a tooling station which is adjacent the holding station during deformation . the predetermined wall zone is co - aligned with the tooling by rotation of the body about an axis prior to securing at the holding station .