ok I just thought of something but cant figure it out. on rearsets its 1 down 5 up right. well you use the top of your foot to up shift. why doesnt a company make a lever to shift with your heel up? does that make sense? only reason I ask is cause due to my accident back in august my ankle is almost fused together and I dont have a lot of range of moitin in it. I can up shift but takes just a second longer to do so. would there be a reason why you wouldnt want to up shift with your heel?