I've got a front tube axle that came with the T project. I haven't seen one with gussets on it like this one so I don't know who made it, and the most troubling thing is that it is not drilled for the kingpin keepers. The kingpin set that I bought for it fits nicely and they have the slots milled for the keepers. Do I need to have these drilled or is there some kingpin set with snap rings on the bottom to retain it? Can I drill them? I don't know. Just trying to use what I got.