Image is of my old PT
1975 design. Updates bought it to a 53kg limit.
This boat has adjustable lower forward stays, usual downhauls and rotation and remote lift boards and the spars had to be aluminium and this boat could easily be 45kg with carbon.
I don't think the race is to get weight down but to get interest in a non trap one man boat because of macho attitudes to not being at extreme limits.
The fact is there are thousands of people who would rather hike out than trap and have a no trailer, manageable pocket rocket.
The beauty of this little boat was that I was happy in 30 to 35 knots. So I could always go out and get hammered.
Build it and they will come.