There seems to be some confusion about these locking plates.
A while ago, I read this on a restoration blog:
".. look at the second picture - the last person to work on it didn't bend the tabs! " (quote)
I have read that remark about the tabs before. (originally they were never bent over)
Even if it was the first crankshaft that person ever saw, he should have wondered why there are no locking tabs on the other 3 bolts.
The locking plates are only there to keep the central dowel in place, not to secure the nuts.
They are soft metal, and I don't use them. Not suggesting that you shouldn't , but there are some more competent than me, who don't use them either.
I also prefer to reuse the original nuts and bolts , if in good condition, over new ones.
