Does the seating position on the F3 create tailbone pain if this is something you are inclined to get? I have had three tail bone surgeries and get uncomfortable in a car after a decent length ride. I like to be either inclined enough to put pressure more on my back or straight up enough to allow the thighs to take the pressure. My favorite bicycle is a tadpole which allows the back to take all the pressure. I have sat on a few F3 models and cannot determine. The RT may be better for me.Thx for feedback,