Originally Posted by i am cornholio
The only thing I can figure is the 0r03 o-ring is what is making it too tight
OR03 is the big O-ring that seals the join between AT23 and AT24.
Do you mean OR05 maybe?
Could you please to measure the outer and the inner diameters of your OR05.
It should be JIS P4 o-ring sizes: 3,8/7,6mm.