I would pick that up in a second if the tubes were original and usable. I miss my SR6. Has anyone seen how the Wing tubes are bolted on these Avons? There was an SR5.4 at auction over here in CA with Wing tubes bolted on too.
They install a bolt rope track on the outside and bolt through a flap on the inside like your Hurricane. The strange part was that the tube is still glued to the transom so it is not as easily removable as a Hurricane tube. I made an offer based on all the work needed but they rejected it .