What is the matter your addressing? For example I have seen Jab 230's have lead shot / epoxy added aft due to not being able to get the nose up as desired at roundout / speed decaying and that is not a normal situation for 230's when rigged and balanced correctly. This was being done by an experienced Jab person; don't do it without seeking expert advice though. Is the elevator deflection up and also down as per the build manual. (This would be a first check, they have a pattern tool to check them. Perhaps Up is below spec? Have you contacted the factory with details of your matter, they will assist with good information, I'm sure. (If you PM me I'l ask my friend who has helped with 230's if he is happy to talk to you, I sure he will.)