Gentlemen; Recently I was given a 1000 gal. propane tank. I have mag drilled 4 holes on top for 1 1/4" couplings and welded the couplings. One on each end and 2 towards the middle. Can I keep all my fittings on top? Dip tubes?The only fitting on the bottom of the tank is the 1 1/4" outlet. I am all setup to finish the welding this coming week.