Thanks tunrerminator. Alas, Peterborough is about 3500km from here.
I picked up some tech cord any way. This will not replace the spectra that HH uses. Instead, I formed two loops out of the Maxim with a double fisherman loop. Then each lop gets a descender ring attached with a lark's hitch. These will be used IF I have a hang that is too wide for the stock lines and straps. I have used a clove hitch to attach a descender to each spectra line on the hammock, and these will feed through a biner, back to the ring and tied off to tension the line. Drop in the tech cord loops between biner and spectra if I need extra length. Will test it out next weekend.