Go the Flyer

I have a B66 (sprung) on my old BSA with inverted North Roads. I weigh 110kg / 240+ lbs. The springs are great and don't bottom out.

I want to stick a Flyer on my BSA and move the B66 over to a roadster I am going to do up

All the above comments about wider saddles being for upright riding positions are valid, but personally, my big behind copes fine with the B66 and low handlebars!