I don't think it is quite that simple. Dropping the pressure to 11" WC would defeat the purpose of using high pressure burners in the first place. Also, I believe the jet is different for high pressure as opposed to low pressure burners. Here is a link to another thread that has a big...
I believe that those valves can't handle the high gas pressure required to fire high pressure burners. I have the same valves, and I am using them with low pressure banjo burners.