The Ultra Series have the 350 mm mast shift standard, a 250 mm version is an option on the Mule. The feet do not move, the mast slides across the beam.
All models of Fencepro post drivers are designed to fit a wide range of options. Most options can be fitted at a later date, however many will need a spare hydraulic valve to operate them. Fencepro recommend fitting a valve bank with spare functions if it is likely any options are to be added later on.