Marty,

First let me "Thank you with all my Heart for a Sailing Topic!"

That long line on the Tack of the Gennaker is there to regulate the
height of the Tack. I run thru a block and back to the cockpit. I secure
it to the stern mooring Cleat. Roughly speaking, The farther downwind
(Running) the higher and forward you want to fly the tack. Marty, It is
a powerful Reaching Sail. That is when you want to lower the Tack
(Flatten) the sail.

Going Downwind, I go Wing-on-wing with the Main and the Clew of the
Gennaker poled out with the whisker pole. This is when you raise the
Tack. The Sail is designed to sail with the Clew higher than the Tack.

I've borrowed the technique of the new racing boats with the extended
poles for flying the sail. I've mounted an eye on the foredeck and a
loop on my anchor roller and extend my Spinnaker poled out past my bow.
I run the Tack pendent thru the eye of the spinnaker pole and back to
the cockpit. Got to make sure Tack Pendent goes over and outside the Bow
Pulpit.

Hope this helps. Its a damn good light air sail. Use it on days like you
described. Once it start to draw it helps the Apparent Wind and is easy
to sail.

Marty, I rig mine with twin sheets in the clew, with the Lazy Sheet
going forward outside of everything. Over the forestay, over the bow
pulpit, outside all stays and riggings. This way when I Gybe, I let go
on the working sheet, let the wind carry the sail foreward of the
forestay, Draw the sail up behind the main and make it fast, Then I Gybe
the main over. This is a Gybe with no one on the foredeck

Post me if I can help

Ole Thom