Question about Diminutive Siege Apparatus

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How many points of your trading skill you need to start making these kind of siege ? anyone knows ?
CheerS m8's

 

[rampant]

800 in your crafts to deploy - i think it may be 400 to create

 

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Thnx m8

Thanx a lot!
Also sorry folks cause i post it in wrong section just noticed!

 

[Sugah]

800 in your trade to make. Any skill (as long as you have a trade skill) to deploy.