I have Nivomats on both my E3's. They are great. Unfortunately, ZF will no longer rebuild them. They would 10 years ago but I can't even get them to agree to try to do a service on them if I ship them. If anyone else has Nivomats, I suggest you email ZF and request a service quote. If enough people ask, perhaps they will consider it worth their while. They told me they no longer have design specs for these so they can't test them. They did a few years back.