Not too long ago finished adding a center seat to my 16 footer. Got lots of good advice here.
My center seat is postioned 9 inches behind the center thwart - as mentioned adjusting trim by adding weight in front of you is much easier than the other way.
The center yoke thwart becomes a hinderance so you must deal with that.
My solution (suggested by a friend) was to remove the center thwart and replace it with 2 inch webbing to span the beam and 2 D-rings on the other side. Weave the webbing thru the D-rings and you have a temporary carry thwart. When not in use roll up the webbing and it is out of the way. I don't portage so when I am by myself all I need the webbing to do is allow me to lift and carry the boat to the vehicle.
The removable wood yoke thwart option seemed problematic - storing the parts and trusting you don't lose any of them on a trip was not attractive to me.
I added a foot brace for the center position afterwards.
Photos can be sent if you're interested - I can't post them here.
Bent Shaft Canoe Paddles
Rescue / Throw Bags
Reflective Hull Decals
Classic Freestanding Rack
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