The original fiber is J. Knits Our Best Roving in the Tampa colorway. I had already spun another 4oz in a different color and wouldn't really classify it as "best". Both bumps were really matted and dense and require a frustrating amount of pre-drafting: ripping the fiber into thinner strands (almost pencil roving) and then opening THAT up, so that the fiber would draft/pull smoothly and evenly.
In the end, I had the following two-ply:
It's a lot more even than the brown one and I'm planning on knitting it into a baktus scarf. Barber-pole two-plies really look their best in garter stitch, I think.