I am getting ready to change my sprockets again from 50-55. Last time I changed them from 47-50 I bought new (3) of the flat plate double bolt locking plates that you bend one tab up on. You can use these two times but they are $10 a set. My question is this: has anybody ditched using these plates on the bolt head and replaced the stock lock nut with metric nylock nuts? Is there a good reason to keep the locking plate on the bolt heads? I can buy SS metric US made nylocks cheap and use over and over.