I rode a Q45 for 500 miles but sold it due to its weight, the way it aggravated my previous neck problems when countering the pedal-steer, and recumbutt in spite of a Ventisit pad. Fast forward a couple of years on a very comfortable P-38, and I'm thinking about an S40. How is the S40 regarding recumbutt compared to the Q45? I think my neck would be okay on a Cruzbike now. My practical side says stick with the P-38, but I really like the Cruzbike design.