ALIGN PILATES PLATFORM EXTENDER - FOR C SERIES REFORMER, Our C series reformers share the same accessories and can easily adapt to your teaching requirements! Available with or without leg extensions, they can free-stand or be stacked, and can accept either Half or Full Cadillac frames, giving you the most flexibility on how you wish to work with your clients and your studio space. C series reformers ship 95% assembled and ready for use.