I am changing the z axis saddle on a puma 400b I ordered the parts and the new saddle came in and it was different than the old one so I called the place I bought it from and they said they would have to contact the factory to see what changed . the problem is that the bearing housing for the x axis does not fit on the z axis saddle they changed the mounting bracket and the reseller did not tell me I was going to need a new bearing housing if i knew the part number to the new housing of course I could just order it and be done with it..... has anyone else had this problem and if so what is the fix I have pics I will post shortly