Waste Oil Heater Forum - Your definitive source for burning waste oil for heat.

I am building my own waste oil burning heater.  I have done a lot of research and I am using ideas from all different designs.  I have an 80 gal air compressor tank.  I have built an Ozzirt style burner and placed it inside the tank.  I know the ozzirt burner isn't made to be inside the tank but I was going to ad a blower fan.  The burner isn't burning as clean as have seen others burn clean.  I left the vents in the rotor open and drilled 6 holes in the rotor.  Should I weld the vents closed and keep just the drilled holes?  Should I drill more holes in the secondary burn tube?  Or should I scrap my idea and mount the burner on the bottom of the tank so it is outside the tank like the original ozzirt hetaer?  Any help is appreciated.