I decided to go with the intermediate 1L pot in an effort to try to tip as many odds in my favor as possible. I'll let it fill out the 1L pot for a few weeks before up potting into its final 2G flowering Net Pot. The 1L is a non-SIP.I'm going to let the transplant get a more robust root system before up potting to see if that makes a difference and, if not, I'll probably have to go to an intermediate step. I like to go directly from 9oz right to the 2gal SIP, but I could make a stop at a 1L intermediate pot to help build better roots in a smaller, more controlled watering environment. I like the ease of going direct to the 2gal, but maybe I'd have better luck with an extra step.
This smaller intermediate pot should give me more watering/feeding opportunities and therefore more chances to fix Ca issues along the way.