Why not ask Peter's advice?
If you are thinking of using the nipples (zirks) at the top of the kingpins as another grease point, as many will know, I and a few others disagree with this approach. What's the point of injecting grease from two different locations if it arrives at the same point?
I agree. If you want to not use the stub axle zerk but use a zerk on top of the KP. Take a long 3/16" drill and extend the grease galley down to the grease reservoir in the stub axle then cross drill to let the grease out. This is a 6 pak of beer job and I used to do this as I was sure the KP's needed much more grease. Not so sure it was worth the effort. Also cross drilling induction hardened chrome rod is not for the light hearted.
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