After my first use of the dual speed focuser, I’m very happy with the purchase. It was simple to fit and greatly enhances my observing experience. I use an FC100DC Tak with a Baader Mk IV zoom (most of the time) and you need to slightly adjust the focus to allow for shift between magnifications. This makes it much easier to nail the focus quickly, I don’t know why they’er not fitted as standard. Excellent service and speed of delivery from FLO, thanks everyone!