Another second clamp solution, I got a 32 mm QR frame-seat post clamp band,

At my LBS, to answer question below.

took off the lip from around the the inside edge, that is there
to shoulder on top of seat tubes.
so It would Just slip over the seat post, then set it upside down on top of the frame,
top is square , as is the top edge of the frame's bushing lined seat tube.
and cranked it's QR shut.. Metal to Metal around just the seat post.
and stacking on top of the top of the seat tube.