Turns out my chiller system was only 1/2 filled with Freon. This is the issue when dealing with dealers and R1234yf. You can only fill that at dealers since most mom and pop shops don’t have these machines. This is something to consider if you want to keep stock Freon. R134a seems to be the choice for most since it’s cheaper and cools better.
The stage 2 kit I have needs about double the charge of Freon. Stock fill is 624 grams. We put in 1300 grams. Temps seem to be much better now.