One regulator? A dual one? Are those just meters you've drawn? If you have two regs, then it looks like it should be okay. How do you know they are carbing slow, or slower than before?
"Beer, well respected and rightly consumed, can be a gift of God. It is one of his mysteries, which it was his delight to conceal and the glory of kings to search out."
The Search for God and Guinness by Stephen Mansfield