BK, if you get concerned about a thwart, here's something to consider. Other than to lean on or tie something to, the main job of a thwart is to keep the gunnels together. Under stress, the two ends of a boat will try to fold in onto each other. This buckles the sides (and gunnels along with them) outwards.
A thwart doesn't need to withstand compression, just tension. IE: you don't need a stick, though it will work. A rope across from one gunnel to the other will do the job. Light weight, no moving parts, easily added and adjusted, easily removed, cheap.
A thwart doesn't need to withstand compression, just tension. IE: you don't need a stick, though it will work. A rope across from one gunnel to the other will do the job. Light weight, no moving parts, easily added and adjusted, easily removed, cheap.