I found raising the ring about 3" off the floor and ensuring good air-flow helped a great deal with my NG burners fuel-air mix. However, I'm keeping the kettle about 18" from the ring otherwise the flames shoot out from beneath LOL!!
Orange flame means fuel-rich atmosphere for those that don't know.
Kramer it looks like you might have some bi-metallic corrosion going on there with those hex screws plugging up the jet-holes.