Ampoules for producing a reaction gas and systems for depositing materials onto microfeature workpieces in reaction chambers are disclosed herein. In a preferred embodiment, the strip-blade holder assembly includes a front segment fixed to the skate plastic superstructure; a latched, pivoting rear segment arranged to apply and maintain tension in the strip-blade. Simultaneously, an external write enable signal XWE and an external address signal ADD are received, and a memory cell 1, in the memory core 6, corresponding to the received external address signal ADD is selected. The grommet includes at least one transverse projection.