My problem with this ink has now moved on in an unexpected direction.
I was tipping it out of my TWSBI bottle into a wide necked small bottle, before getting it into a plastic Diamine 30ml bottle to give away, when this large clump of SITB fell out. I capped the bottle I was tipping it into and shook it, in case it would dissolve it, but although it foamed up like washing up detergent, the large clump is still there. When I rinsed out what was left in my TWSBI bottle there were strands of "stuff" in the water that filled the sink.
I'm really sorry jmccarty3, but I can't send you this stuff, as I don't think it's safe for your pens.