I used my ball winder to wind both singles into center pull cakes to ply end to end. My spinning teacher recommended this for me based on the twist/singles she saw me making. So I just decided to give it a whirl and I learned a lot.
First up, I could really tell I spun the purple singles first. They had much more thick and thin spots with plenty of unspun bits. That is compared to my teal singles that got more consistent thanks to practice. And both skeins had some overspun spots where it made plying extra hard because the yarn kinked back up on itself.
At the end of the day I have two filled bobbins with almost finished yarn. Next up for those yarn babies is bath and whack! Happy Spinning!!