I don't, exactly. [Spanner shrugs.] But I keep on coming up with new ideas, so I keep making new Moscas to try them in.

Besides, they might be necessary if anyone comes after me in here. Some of the people who want me to make weapons for them are really insistent about it. [Spanner's matter-of-fact tone doesn't betray any particular alarm or urgency in this, but if he thinks he might need ten or more Mosca units to defend him if these people come after him...one can infer the seriousness of what he's talking about from that.]