I bought, and installed my new Mfactory Helical lsd ... I also installed techno toys 4340 billet stub axils that i did have to make 4mm spacers where the bearing is pressed on against the flat plate side with wheel studs other wise the plate would tighten up against the bearing housing locked to where it would not spin freely , and I also used OEM 300zxt axils that were in fantastic shape like new internals i installed new grease ,and boots flipped the bearing cage on passanger side axil ,and painted them .... the adapters were from silvermine motorsports i came up with a method to center the companion flanges to adapters by using jb weld and using a digital measuring caliper to center before jb weld hardened holding the companion flange in a vice and putting the 300zxt adapter on top while jb weld cured to hold parts in position for welding ... i used a 2 1/2 thick machined flat large metal plate with 5 clamps to hold the companion flang ,and 300zxt adapter round plate tight with force on the 2 1/2 inch metal plate for welding process to keep every thing from warping, and it worked perfectly . I left it clamped until everything cooled down after welding ... The adapter ,and companion flange after this clamped welding run /spin true flat with no up and down or side play in movement while spinning zero vibration while running on the car .. every thing is worked out pretty good so far every time my TCI street fighter 700r4 hits 2nd gear both rear tires bark posi , and around the corners it feels great tracks fantastic ... some pictures