The model sending is not the same as the image but can apply by 2 screws not 4. I wonder how firm it can make.
Astro Grus focuser is working good with Sharp Cap and NINA. Nice fit and finish. Good lower cost alternative to other focusers. Pairs right up to ASCOM with driver. Not sure whether linux driver is available. Hand controller works good. Don't forget to request focuser driver from seller. Seller maintained good support to get me the correct driver. JT