This NGF-S ($279 new from JMI) includes the $45 large format adaptor for SCT's 10" and larger plus an adaptor for its output to accept SCT accessories (without the adaptor it accepts a standard 2" barrel). It also includes the hand control box although it can also be operated by the focus controller in an LX200 or LX200GPS. It's several years old and has been used but it works very well. These let you finely focus the scope without moving the mirror, so there's no image shift while focusing. There is a small crack in the plastic motor cover (where most of 'em crack) but it isn't noticeable. I've switched to an LX200GPS which already has a Crayford-style focuser with it. I'll sell it for $225 shipped CONUS. I accept paypal (no surcharge) or postal money orders. Astromarters with great feedback can send a personal check.