CoV; the power requirement is spent in Coal, not Income.

“A Commoner can create an Invention, with a set of existing Parts of his choice, in their own possession by spending Resources equal to the total Compositions of every Part in the Invention, spending its Power Requirement in Coal, and reducing his income by its Power Requirement;”

The power requirement is spent in both Coal and Income, so it’s fair to get back Income when you dismantle it.

I was planning to propose something like this myself.

Regarding the ability to do this at-will I suppose I defer to the Mad Prince’s judgement.  I would have preferred dismantling to have to be done by a specific Part.

But again, Inventions don’t have a “Composition”.

Hix: Yes they do. Read the rules.

[Ienpw] No; the ruleset says that Parts have Composition, but doesn’t define what the Composition of an Invention is. It’s only very loosely implied that the Composition of an Invention is the sum of the Compositions of its Parts - we should really state that explicitly somewhere.

I agree with Hix on both points; it’s probably worth a fix proposal once I have slots back (to make this a cheap Part rather than at-will, and to define Composition).

I suppose it’s down to interpretation.