yep at the end its depend on the swordsman not the sword
hmm
if shusui raised in rank cuz it turned to BB that means shusui was originality fom wazamono grade 50 swords maybe they were 51
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hmm don't know if those zoro current swords continued with him until the end
but if they will that means all of them will turn to BB and raise in rank
sandai will raise to wazamono 50 and it become 51 swords
wado and Enma will raise to Saijo O Wazamono 12 and it become 14 swords
o wazamono will become 19 swords
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but what if zoro got a new sword from Saijo O Wazamono 12 and turned it to BB
is not think will make new grade above Saijo O Wazamono