I have a very minor oil leak from someone around the swivel, probably form the swivel seal. We’re talking over the course of a week perhaps a few drips. Annoying but not a disaster, I had put new oil into the axle and swivels a year or so ago, so I will drain out the oil and replace it with “One Shot” grease, this should to be thicker and hopefully not leak out. I left the oil draining over night so as to get most of it out. Drained the oil out, it looks a little emulsified. The seal and swivel look okay, perhaps the seal is just old and failing to press against the swivel well enough. Next job is do the refill with the One Shot stuff.