@Mr. ZorG Basically we generally fully agree. (Maybe you misread some of my explanations due to issues in Russian-English translations.) There are some changes in the Sub-mod that I like and others that you like. There are other changes in the Sub-Mod that I do not like and others that you do not like. All the rest of the team and community surely has their own preferences as well. Summary: The mod as it is can not simply get fully integrated as "one piece" into WTP core mod. Some parts of it however might get integrated selectively into WTP core mod. If there is interest by @Vaeringjar , community and the team, we need to go through the effort to discuss and figure out which parts should make it into WTP core mod and which parts can not. (Considering the amount of changes this will take a while however ...) ------- Such a "tool to test" does not exist and can technically not be implemented. (You cannot simply copy and paste the XML files and graphical into Large Rivers and compile the DLL again. This is not how modding works.) "V's Sub Mod" is currently simply incompatible with code and XML Schema of Large Rivers . It first need to be made compatible again, by carefully merging V's changes into Large Rivers which would take an experienced modder (understanding XML schema) about 3 hours. This directly leads to the following: 1. At least 3 hours of effort for an experienced modder to carefully merge V's Sub Mod and Large Rivers. 2. Creating a new branch of Large Rivers (that will later be thrown away because the changes have not been approved yet and some never will). Summary: You are basically asking one of the experienced team members to invest at least 3 hours of effort to create a test version of Large Rivers in a new branch for you that will later be thrown away again. Sounds like wasted effort that could be invested better otherwise.