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There's a fizzler model you should be using for the cleansers (it's literally called fizzler.mdl
). Use this because it looks far more professional than the fizzler just being there. -
The laser receiver and emitter both need to have an alcolve for them, and the reciver's not alligned to the texture grid. (either cut it using the CLIP tool or you can make the brushes around it which is what I usually do)
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speaking of textures, you should try to vary your wall textures a bit, and also try to cut with the textures and no through them. This looks much better and with little effort involved.
Apart from these little things it's looking nice. 
EDIT:

Apparently the sign can tell when I DIDN'T AVERT DISASTERS...
This was an attempt to make the coop hub sign setup in a custom map. I stupidly put the panel sizes at 512 X 1024, thinking in pixel size and not hammer units. And paid the price. DX

(Well maybe "Wheatley" style have bits of destruction somewhere)


