My brother was selling his Ork Looted Basilisk and I figured I could use it in my Iron Warriors army. The running theme in the army is technology, which explains the looted and modified Tau railgun.
This one didn't take as long to convert as the Daemon Prince (about 12 hours) but it took over 24 hours to paint. (The major contributer were the hazard stripes ... they took over 8 hours because I kept making mistakes!)
I've used it in a couple of games and scored a lot of hits but did very little damage to the enemy.