Adding a solent stay or changing to a headstay/forestay combo will result in a sail tension nightmare. Especially on a boat with only a 12'6" J dimension any sail 'interaction' of the headsail/staysail will be nil and only adds complication but little advantage. Translation: your J dimension is too small to be of benefit of either a solent or 'cutter rig' configuration (cutter rigs have the mast at 40-50% of deck length back from the bow/sprit).
I dont think any 'rig alterations' for your particular boat would be of any benefit.
For storm conditions you might consider a trysl (or add a 3rd reef to the main) and a storm jib combo that are designed (in combination, so you get the 'combined geometric moments' correct) to 'balance' the boat ... a good sailmaker who specializes in heavy weather offshore sails can easily do this - hank on !!!!!
Solent stays and headstay/forestay combos ALWAYS result in variable shroud tension difficulties, making sail SHAPE requirements a royal PITA - something you really dont want/need on a 30ish ft. boat. A single headstay/backstay combo is the 'easiest' to control - just a simple backstay adjuster; with solent, etc. you NEED running backstays, etc. to get the rig to 'work' properly (and in getting to 'correct' stay (head/forestay) tensions you may 'overstress' other parts of the rig). Correct rig tension allows correct SAIL SHAPE (especially luff tension and luff SAG if you NEED to go 'upwind'), with a multi-headstay rig you will have a 'tension and sail shape complexity nightmare'. My advice: keep it simple.
Last edited by RichH; 05-09-2011 at 10:20 AM.