We have an inner forstay on our Passport 40 which is tacked up about 36" aft of the main roller furler
. It connects in up on the mast
at the second spreaders. This is the usual way of creating a staysail forstay. Now.....one could install a furler on this but as has been mentioned a bit on the thread, it does get in the way and when not needed can be a bother. If you make the inner forestay removable at the tack point of the wire and take it back to a point near the mast
where it can live 90% of the time, then you would be free of the clutter. In order for this to work, you should then have a hank on staysail which you would put on only when you would likely use it. The rest of the time, it lives below in a sail locker. There are lots of removable stay mechanisms on the market...Forespar, Harken
, Nicro Fico to name a few that would allow you to safely connect, disconnect and tension the inner stay when needed.
Staysail is a nice sail in heavy air....really balances out the boat. But when its not needed its nice to get it totally out of there for easier tacking and moving about on the foredeck.