I suppose it's not a good idea to use
two different brands/material of needles that are supposedly the same size in one project, right?
In the pattern I'm doing, you CO first onto size 2, knit 3 rows, then change to size 3s. I've been CO to my size 2 Boye interchangeables, then for my size 3, I've been using my bamboo Crystal Palace circulars. Right now my sleeves are on them.
I thought about CO for the left front on the Boye size 2, then just changing the tips to the 3s. The Boye tips are just the smidgenest bit smaller than the Crystal Palace per the holes in my needle sizer. I also thought that since one was bamboo and one was metal, that might change my speed and thus tension a bit too.
And it's not like I can actually simultaneously knit the sleeves and fronts anyway, so I could wait until the bamboo 3s are empty again.