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Basically, I need 3 Rapier Laser Destroyers in my IG army and don't want to shell out £75 for them.
http://www.forgeworld.co.uk/Warhammer-40000/Imperial_Guard/Cadian_Shock_Troops/GRAIA-PATTERN-RAPIER-LASER-DESTROYER.html

I decided to use Plasticard as the main bodywork (side panels + floor panel) of each Graia -
6 Trapezoidal Side Panels
3 Rectangular Floor Panels
I have cut these panels out and they're ready to be converted further. I had to guess at the dimensions, but the Guardsman in the picture provided a point of reference, so I do believe I've made them of similar size.

I've been looking in my bitz box, and found -
Necron Tomb Blade Shield Vanes look good as Gun Shields for my Graias. I have put those to the side for later.
Necron Tomb Blade Gauss Blasters x2, next to each other... look quite a lot like a quad laser. I'm going to use those as well.

What I'm missing -
Wheels/Tracks. I don't really have any parts that look like tracks or wheels, and don't really want to a buy a tank box just for the tracks. Any ideas?
The sides are completely unadorned. I could just shove on any spare bitz possible, shovels, fuel cans, etc. I'm just worried it'll still look flat, with just some random items... not the side of a tracked vehicle. Any ideas on how to make the sides look more realistic?

Any other ideas + thoughts on this?

Thank you