Just upgraded my N8GPS to an N11. The purchaser of my 8 did not want the FeatherTouch MicroFocuser so it's up for sale. This is the model that replaces the stock focuser on an 8" Celestron tube. Works great and is in like new condition. $135 shipped US. Check or MO, but I will wait for funds to clear if it is a personal check before shipping. Thanks for looking.