Share 'About Panning machines'

I plan to buy one pannig machine.  I am confused with the follwing aspects.   While buying a Panning machine which aspects we have to consider more?   Is there any advantage if the Coating pan is of Copper?  Or is  steel  coating pan  as good as  the Copper one? They say that only if there is resistance inside the pan the Dragee will become shiny, Otherwise I have to give the final coating of Gum…