The focuser in the link is for a SCT not a refractor. You will need a CF or CFL focuser from ML or maybe a feathertouch or even one from Baader.
You may be best to purchase a
ML direct.
This page suggests the ML CF has a flange to fit the Genesis, see 1/2 way down page. A CF focuser (with flange) is around $275 USD which is around $208 Euro (no delivery costs).
ML focusers are quite heavy!