Old Puffer Pete of Chuggington has similar advice:
"An even pace with and even load is best to ride the road"
Well with this in mind, after several years of me and Clare sitting on uncushioned sitting benches I made I've finally added some foam and covering. And guess what, it's loads more comfortable!
Old Puffer Pete may be old and slow but he gets the job done still, sage advice for me, and may be a few others too.