I can help. I also have some Hammer experience and can help touch up your maps (not like you need assistance on that though). I particularly enjoy creating custom soundscapes, so befriend me if you want some specially designed for your maps (or for a sampler, there's a link in my profile). All I need is the basic geometry of your map (preferably in a .vmf so I can track down certain points in the map), including the location of any moat areas such as goo pits.

Best of luck with your mod Hope you don't spoil all of it on the workshop!