I am a member of TechShopRDU. One of the tools they have there is an Epilog Helix 45 laser cutter. With this I have been able to cut out some custom mega-Apocalypse templates (a 15" blast, to name one) and a few other goodies for our games. One thing I'm working on now is a Tzeentch Silver Tower, inspired a bit from here.
The above picture is a rendering from Rhino3D of all of the panels I'm working on for my Silver Tower. For a bit of scale, the tower is 28" high and the bottom makes a 6" wide hexagon. It's big.
My friend, Curt, had a great suggestion. We could make two different designs for the etching on the panels; one for Eldar and one for Tzeentch. I think that's a great idea. They could both use the same data sheet. We'll call the Eldar one a Crystal Spire. What do you think?