Hi, Jami,
I knew I had a PBO (March 2008 Practical Boat Owner) test of a Galion 22 somewhere. I'll try to send you on a copy of the report when I get more time.
Quoting from the report;
"For our sail, we picked a day when it was gusting up to 20 knots, prompting Jim to drop a slab in the mainsail".
"He tends to reef if conditions are marginal on the basis that the helm can otherwise get heavy, but while the tiller had a firm feel, it only exerted any appreciable pull if we let the gunwale got close to the water".
"It would undoubtedly feel lighter if the tiller were a little longer. It's on the short side at 0.7M/2ft 4in. to save some space in the cockpit."
They concluded that overall, it was a great little yacht for its size.
So it seems that heeling the gunwale into the water is going to introduce weather helm and you have shown yourself, that the Galion can be steered easily simply by heeling even slightly to one side or the other. (More heel, more weather helm) Also, that the boat went well to windward with just a scrap of bermudan genoa, (and no mainsail?) which wouldn't have created a huge heeling force.
You talked of a lack of drive to windward with the Junk Rig when reefed. As it drove quite well with just the scrap of Genoa, maybe your sail needs a little more camber in the upper panels so when reefed down then, you would still have the power from fuller camber while lowering the Centre of Effort and reducing the heeling effect which will help reduce the weather helm, keeping your rudder straighter and reducing drag from it as well.
A bigger rudder and longer tiller (I'm not saying they're a bad idea) will physically help you to keep it straight while heeled and reduce the load on you, but what about the load on the boat? . Physically overcoming forces with extra leverage might overload the rudder fittings.
Reducing heeling and more camber in your upper panels for more forward drive when reefed might be the answer.
PS; I've wondered about this. Reefing reduces sail area and lowers the C of E and in itself would reduce heeling. Could you then get away with more camber in the upper panels to provide the drive you need as the sail reduction will of itself reduce heeling?
But with less camber in upper panels normally recommended to allow for different wind-speeds and direction at the top of the mast when under full sail, is it a case of having to compromise, with the Junk Rig, between correct camber under full sail and under reefed sail?
Not sure the above is of any help at all.
Dave D.