Location of the seat, is a little to far forward for my solo's. Mine are set at about 5 1/2" towards the rear to give the hull a slightly Bow light waterline. This will also improve handling.
Also lower the front edge of the seat ! About 3/4" lower then the rear edge. This will improve comfort a lot !
If you try and sit in a seat that is level with the underside of you gunnel, you will likely be unstable ! Kneeling only will be OK.
I’m with Jim on all counts; further back, canted forward a little and hung at least a bit below the inwales. You’ll know for certain the first time you try it out as is, especially if you find yourself rocking broadside waves or running downwind bow heavy.
Some aspects of seat placement are a matter of personal paddling preference. I paddled tandems bow backwards for decades and further back feels natural. In solo boats I prefer the center of my seats 10 -11 inches back of center hull, depending on the canoe.
The Spirit II is decently deep at center (14”), but has 5” of sheerline rise at the stern (19” stern). Moving the seat back further will also provide more depth to work with. Maybe lay a board across the gunwale and check the depth difference at center and at 10” back. You could probably move back a seat width, and reuse the rear seat holes in the gunwales for the front holes, reusing the same seat cut narrower.
I sit 90% of the time, so all of my seats are on drops, and stern or center seats are canted slightly, in part for occasional kneeling comfort and also to help keep me from sliding backwards while seated (especially when using a foot brace).
Clearance for kneeling is of course shoe size and footwear dependant. With size 12 EEE’s I’m kinda screwed if wearing boots. Something with a more flexible sole helps, especially with the more difficult foot extraction process; I can angle and slide my feet under quickly and easily enough, getting them back out is a lengthier process, trickier and wobbli. . . . . .glubglubglub.
Too late now, but a contour seat will put your butt an inch lower while preserving foot room along the sides.
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