Manosoft made a successor to the C64SD. He replaced the processor with a Atmega 1284p which has double capacity (128 kbyte). The new version now has a pass through for the Datassette port and a revised reset circuit. You can watch the promo-video of the C64SD 2.0 Infinity on YouTube. The promo-video is in the Italian language, but has English subtitles.