have you experience plywood?
at 14W, i bought nashbar bear traps and bolted ply both sides with 8's
held by the
traps teeth.
Comfort: the extra width allows the hips to motion in a more "natural"
orbit with off course a slight decrease in forward speed upwind. this
is a big deal- narrowness may be steel costs savings and not anyhing
but
the mod takes no more than two hours to hack out.cut four squares.clamp

together and sabresaw as one. drill ditto. paint with yellow rusto.
and when crossing the 4 wide express blvd in a wide upstream arc
keep that inside foot up!!