Jake,
The day I hooked up my lathe the cage guard thing got thrown under the steps where it remains, still wrapped in cardboard, and the second locking handle was put in a drawer, as a spare. Now I could be faulted for the guard, but one locking handle has suited me just fine.
By the way, I am making use of the Guard holder bracket. I have mounted a goose necked lamp on an aluminum rod that fits in the guard mount hole. I have also duct taped my dust collector hose to the same rod to get closer to the source.
BP