[killarney_sailor]

For this use, using line should be fine and it would be much easier to store when not in use compared to wire. Without doing the sums, that lever might not be up to the task. On other thought, you may need to have running backstays to balance the inner stay since your current rig was not designed to have a load in the middle like this. Don't know your boat, but if you don't fore and aft lowers you should not even consider the possibility of a staysail without runners. Runners certainly can be Spectra or something similar with a simple block and tackle for tension.