Having picked up the Ruined Factorum sprue that came with Warhammer 40000 Imperium 31 a couple of weeks back, I also purchased issue 34 for the second sprue .
The ruins are from the The Battlezone: Manufactorum – Sub-cloister and Storage Fane kit which did cost £37.50 at Games Workshop and contains two similar sprues. So at £8.99 you would be making a saving of £9.76.
You get two corner ruins, all coming on a single sprue. They go together really easily. There are two corners, whereas with the other sprue you got a large corner and a smaller corner. This one is similar, but the smaller ruined corner is larger and the larger corner is smaller (if that makes sense).
I used Humbrol Tank Grey 67 spray to give the underfloor a darker feel before giving the model a coat of Mechanicus Standard Grey Spray.
I gave the models a wash of Nuln Oil Shade.