Casting from Invested Devices

Sorry if this has been covered before but...

When using an invested device, is it the makers casting score used or the wielders?

Can,t find ref in AM 5th


The answer to your question is neither.
As even mundane people can use invested devices, no casting score is ever needed.

The penetration (if any) must be built in the item and is counted on the lab total.
An invested effect is always successful and never botch.

And thus never affected by any casting conditions - positive or negative - so if casting inside a church is hard (or even impossible if yoy want to do it discreetly) the device does the trick all the time.

But remember the Penetration (if any).

This is important!