Not over filled, I would agree if the system overflowed more than it sucked back in.
It def bubbled into the overflow for a bit when first started..so def had some air ..going to do it again tomorrow and make sure it's out and see if it bubbles the hoses again after I shut it off..?
Assuming the recovery bottle was 1/2 full and holds 1 qt. it overflowed a cup or two meaning it overflowed 1/2 qt plus 1-2 cups and sucked back 1 qt. that means there was about 1/2 qt of air in the system.
