I think those bars may be a great idea. We know a team that has a Calfee with an extended stoker section and aerobars for the stoker. In theory and possibly in practice, it is a fast setup. However, the stoker is set back from the captain. With the bars you are evaluating, the stoker will be closer to the captain and it may be superior to the other set up at certain wind angles. Let's assume you qualitative speed increase is close to being correct. At $30, this is the best gizmo I have seen to increase performance.

BTW, you look like you lost weight in that picture but you legs look great.