terrible, just terrible, please ah...send it to me so I can properly destroy it
I think your German is in for a surprise
I dropped a figure into my water and he did just fine, I think it will work fine. If you are really concerned heat it up and see if some sprue warps, but my guy did fine. JUST make sure you let it cool slightly {not bubbling} when you pour it and do use the amount they suggest {1/8th inch deep? 1/4 inch? don't remember}
I put the water one too thick and it ended up with a lip at the edge of my pond. I scraped it so I cannot post a picture. IF you have a paint HEAT GUN you can re-heat the ez-water
I look forward to your mini diorama, and have motivated me to build a small one in 1/48 using that watercooled machinegun that comes with the American set.
Just looked at your pictures again VERY good so far, as for the bridge, if worse comes to worse, get some cheap chopsticks and build the bridge using them but I don't think the ez-water should not give a problem, remember the stuff is meant to be used with RR stuff and they use plastic for bridges and other goodies too.
please shoot more pictures as you go along