Can anyone tell me anything about this place?

I'm writing an adventure set there what can you folks tell me?

I have a few ideas but I want to see what the official fluff is first.

Sheol 17? It's a prison solely operated by the Adeptus Mechanicus to hold the most vile of hereteks until the AdMec are certain they have gained as much information as they can from those held there... From schematics to accomplices and other such information.

-=Brother Praetus=-

The official fluff on Sheol 17 can be found in IHB, page 139.

After reading that bit in IH I played with an idea that it´s quite popular planet within certain circles of Mechaniucs, Imperial Nobility and Inquisition, for producing high quality Pretorian Servitors, chrono-gladiators, berserker assasins, and other more obscure but more effective man-engines... *evil grin*