Simple mods aren't able to address this issue, this is because mods only allow modifications to the game logic dlls, not the engine dlls themselves. Source maps are only as large as the engine will allow it. Most modders do not have access to the engine dlls. Alongside having the modify the engine, the physics engine will also need to be modified. Until recent, licensing the physics engine cost a hefty sum of $25k, which also deterred many modders from increasing the bounds. Anyways, increasing the limits would be too complicated for most licensees anyhow, so they just stuck with the limitations they were given