Got this beautiful bottom whorl spindle from RagBagRebelAlliance on etsy. It’s turned from reclaimed antique parts; shaft is a furniture leg, whorl is a treadle spinning wheel whorl combined with a spinning wheel bobbin end. It kinda reminds me of a dalek eyestalk.
It’s 89g so is going to be a plying spindle. My only issue was it didn’t hold spin well with the flat bottom it was turned with, so I carefully drilled the tip & inserted a ball bearing ball (something I’ve seen professional spindle makers use in their expensive spindles) – it now spins long and smoothly.