BMB-

welcome to the forums!

I have yet to have a problem with havig a powerful servo. I like the holding power they provide even on smaller planes. I dont know if there is too much difference using coreless etc on the rudder. Maybe someone else might be able to answer.

The MDS is a decent motor and I think it will be enough to fly it but you might want tot hink about something bigger i.e. 160FX or larger

matt