What is the best procedure for penis lengthening and does it add erect length?

I am not quite 5 inches erect and would like to be at least 6 inches. I had the FFT girth procedure and Gained an extra 1 inch i(now 5.5 inches around when erect) . Which lengthening procedure is safest and most effective? using laser instead of cutting? Using a spacer by ligament? weights or stretching devices? No weight or stretching device if fat placed by ligament? Some doctors say erection angle will be different .. Others say it won't.. Which method gives the most reliable result?

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