That gordon model is from HLPS2. I'll gladly send anyone the model if you doubt me.
Err, did anyone ever play Todesangst? The hatchet model is used in it...
And have you asked the permission of the model creators to use their models? Crediting them is all well and good, but it's often much more effective to contact them, show them work, and if they like it they'll often allow you to use the models. I've seen more than a few get very irked at the presence of their models in other situations when the author has not asked permission, even if credit is given. Just a recommendation that will earn you much more respect with modelers and such. This is why HIT requires membership to post and download, in an attempt to stop people from using modelers' work without their permission in their mods and such.
Your screenshots show vast improvement over other maps. However, as many others have said, the texturing is repetitive. Since it looks, at a first glance, like the r_speeds are not too high, maybe a look at
this piece of work, similarily themed, can give you some ideas on how to detail those silo textures
.
Best of luck as well.