An injected part designed to form by being folded, an energy absorbing device and a spacer, the energy absorbing device having a number of hollow elements projecting from a first plate portion, and a number of hollow elements projecting from a second plate portion, associated in pairs. Storage devices may be pre-qualified before cluster software is installed for controlling the clustered system. The method makes a second preliminary register allocation attempt except using a less restrictive register set for the identified instructions. A method of securing a stinger within a substantially smooth bore includes: providing a latch assembly on the stinger; inserting the stinger into the bore; and engaging the latch assembly with the bore, thereby securing the stinger relative to the bore, without the latch assembly engaging any recess formed in the bore.