Box #6/7. Retail $270. this box includes: Leg Press System: The heavy-duty steel footplate (pedal), the sliding carriage mechanism, and the support arms specifically for the leg press station. Power Tower Attachments: The handles and structural supports for the Dip Station, Vertical Knee Raise (VKR), and Push-up bars. Station Padding: High-density foam backrests and arm pads specifically for the Dip and Leg Press stations. Assembly Hardware: A dedicated set of M10/M12 bolts, nuts, and gaskets required only for these additional stations. Box #6/7 is the "upgrade" package that transforms the M750 unit into the M900 or M950 versions.