@KorbenDallas definitely every time I went out and did some testing there was at least one thing that just seemed hard to understand. Many times data has disproved my intution on aero matters! So if this has been your experience than I believe you.
But, for me, if I put on aero bars, I got faster. If I put on aero bars and a disk wheel, I got even faster. If I put on aero bars, a disk wheel, and a time trial helmet, I got even faster. If I put on aero bars, a disk wheel, a time trial helmet, and a speed suit, I got faster still. That’s the way things went with me.
Oh, holy crap. I just realized I forgot the biggest marginal gain for @ABG list!