Eagle: to "mirror" or not to "mirror"?

A double sided pcb requires two SMD capacitors to be mounted on the bottom side. In the "package" page I can specify the layers (1.top or 16.bottom) where each element (silkscreen, pad, mask) must be.
Do/can/may I use these settings for a specific device so that the .brd layout always assigns this device to the bottom?
Or do (have to?) I make a regular device and use mirror when designing the .brd file?

Erik

Lay out all your packages for the top layer, then mirror when necessary to put it on the bottom.

And what is the drawback of altering the layers in the package?

The main one is it's easier to work "right side up" than in a reversed view. Plus, there's no reason to have "top" components and "bottom" components.

JonSea said:

The main one is it's easier to work "right side up" than in a reversed view. Plus, there's no reason to have "top" components and "bottom" components.

Click to expand...

Great, thks!