A very old ex-F4 mate told me about the fast jet version. For them, whenever you turn you almost invariably climb. If you are trying to stay VERY low, the best thing to do is a straight line. 550 kts at 5.5 miles on the extended centre-line, chop the throttles to idle, put the gear and flap down at the appropriate limiting speeds, flare and drop the last few feet onto the runway threshold. To save other people learning the same lesson, it's a good idea to update your nav kit before you try it!