So yep, need a tutorial on collison etc... which maybe Hicks can manage if he has some time.
As i noticed fps rate in kfmod depends on map optimization. Some maps may cause slow down because there is too many static meshes, foliage, etc. Especially when many static meshes had default collision properties where is not needed, e.g. skybox, backdrop buildings, junk, papers...Wich maps are you played?