Bare Nature no nose thruster(s)

Going through the archives I found these pics of my 5'11" Tony Cerff shaped early 80's 

Bare Nature no nose thruster from Byron Bay.

She's got all the bells and whistles double fly, swallow tail, channel bottom with adjustable middle fin.

Around the same time my north coast friend sent me some pics of his Tony Cerff shaped early 80's 

Bare Nature no nose thruster from Byron Bay. Also a double fly, swallow tail, channel bottom with adjustable middle fin but this one is sporting a nice winged tip centre fin.

Both nice examples of of the many different design ideas that were being experimented with at the time.