Thanks for the replies. I’ve footered around with it and gotten the measurements to be almost the same and done exactly the same circuit on both bikes. On the Jett, absolutely no issues whatsoever. On the Orbea (albeit did it 20 minutes faster), whilst the neck and mid shoulders issue is better but my mid thighs and right knee (old injury) are aching. I sit on my Jett saddle with my tip toes just touching the ground and my pedalling position is good, it just feels right. I do the same on the Orbea but my pedal position just looks and feels wrong. My knee is still bent when I do the ‘place heel on pedal’ measurement. In order to achieve the correct pedal position on the Orbea, I’d need to raise the saddle a couple of cm but then my feet won’t touch the ground.