I have just drawn up a solid mast for the OZ PDR for those who are time poor.
It is a solid mast which is about 35% heavier than the hollow one.
The hollow one will be better in most conditions because it will make the boat easier to hold up and get back upright after a capsize and will be faster in choppy water because of less pitching and most of the time because of less less general weight.
However I have calculated the sizing of the solid mast to have the right bend characteristic to work well with the sails in the plan. The additional notes available in the link below will work with both the standard sprit rig and the optional lug rig.
If a person already has the plan this page explains what to do.
Solid mast for OZ PDRacer on the Blog
Best wishes
Michael Storer
PDRacer - optional solid mast 
