Focus Boss II is a rebranded version of FocusLynx, built by Optec, and is 100% compatible with Optec parts and motors. https://optecinc.us/.../products/19690
Optec makes an all-in-one autofocus solution for your focuser that does not require an external controller. https://optecinc.us/products/19972
I have two of these motors and they are very precise and well made. They are a little more expensive but pro all the way. The drivers are solid, too. Call Jeff at Optec if you have questions. He is super helpful and can solve almost any problem.
Having said that, I also own a Prima Luce Esatto 2” electronic focuser. It is well-designed and solidly built, too, but I have yet to install it on my 10” newt so cannot comment on its performance.
Edited by gundark, 14 April 2021 - 04:39 AM.