Re: Sailing dinghy w/o headsail
I,m assuming the jib luff is tensioned with some kind of highfield lever. In that case, yes the ideal is to have a dyneema "jib replacement" line, as you can't get the forestay tight enough. The forestay really just keeps the mast up while you're changing jibs. This is how my wayfarer was rigged, until I installed roller furling.
Bristol 31.1, San Francisco Bay