The original Obitsu body has an extremely fragile neck, with the weakest part being less than 3x1.4mm in thickness, which is way too thin for a heavy Blythe head and it can break with just a light shake. This mod removes the weak link and makes the neck many times stronger at the expense of losing the side tilt. Front/back tilt and head rotation will still work as they should. If you haven't broken the original neck this mod will be non-destructive so you can always remove the mod and put back the side tilt joint. Please note that the Obitsu body is still much more fragile than other Blythe bodies so please be careful.
This mod is easy to install. no glue or screws are required.