With this bottom you can easily take advantage of the trogg extra parts and create 3x more troggs! 
 

Make sure to set x and y to 50mm on a locked scale so it scales to the appropriate size. Ankermake slicer is giving me different results than Prusa slicer.

My process was as follows.

I put together the extra trogg parts, then sealed them with army painter green stuff. Waited a day to let it cure.

Then added green stuff on top to make the neck and belly. And then placed them atop the 3D print while the green stuff was still soft.

Size is super close, and height is perfect for creating more troggs.

After letting it cure I then went back and added a thin layer to sculpt the rocks on their back. You can see the texturing on the middle trogg.