No idea to put this I'm wondering if its more aerodynamic to take the bottle holder bolts out of the frame or leave them in? Or take them out and perhaps cover them with something that wont create drag
Those bolts won't cause any drag that would be measurable. Don't get all crazy with the aero ****, keep in mind since 1963 till 2013 the TDF average speed has only gone up 1.3 mph with all the lighter and aero bikes, tech, training, and doping. So now you figure out how much bolts will cost you in time!
So now I'm thinking, oh boy here we go, if covering those tiny bolts with that tape will save 1.67 seconds in a 50k race and some time with the stem cap covered too, which would mean if I covered the entire bike and my helmet and clothes I should be able to smash the world record time in the 50k in my current physical condition.