Hooking a tuning fork to the main studs is what you are doing on a SB. It doesn't stop or alleviate cap walk. Does the girdle, positively engage with the cap? You tying the 4 sets of mains together at the end of the stud. Doesn't do squat on a SB as 33imp laid out.
600hp needs nothing but either good bolts and preferably main studs.
