In addition to copying or migrating your takeoff to a new revision set, could you add another option to copy it to a new layer?
Thanks for the feature request! Definitely see how this could be useful. As a workaround in the meantime, you could duplicate the layer (which would duplicate all takeoffs/sections).

Also, in our next major update, you will be able to shift/ctrl select the takeoffs in the pages sidebar, copy, switch your layer, and then paste to copy the takeoffs/sections to the new layer.
