After all this fuss about greasing or not and mysterious slots this way and that per bolt and only the top hole having a zerk (or two) I am wondering if my RV guy really was a moron!
Nobody has explained how the other two holes get greased unless I missed it. Are they "wet" or not?
( I did get that the shackles are heavier-built so won't wear through their metal vs plastic bushing holes as badly.)