Almost all the Finnish knives come with a secondary bevel.
If these were mine I would be tempted to take the puukko to a zero grind but not the Leuko. That I would simply convex the edge on a Hoodoo hone.
Removing the secondary on the Puukko can take some work. I have almost got my IJ 1244 the way I want it (after several years of owning and using). I took most of the secondary off on diamond and waterstones (keep the primary grind flat on the stone and work and work and work). I then stropped on loaded leather that is backed with felt to give me near mirror polish and a very slight convex to the edge. Otherwise the zero scandi is a bit too thin for my use. Many times the flats on scandi knives are actually shallow hollow ground...so that can take even more work to make flat.
I think a bit of oil on the birch might be all you need to do every-once-and-a-while. Take a look at the join between steel and birch...if there is much of a gap you may want to fill it with epoxy. I have been meaning to do that on my IJ....
There really is nothing wrong with the secondary bevel, but for superior woodworking taking the Puukko to zero with a tiny tiny convex will likely improve it a ton on wood.
These should serve you well. A bit of a project set at first but once you set the edges like you want they should become old friends fast.
Good luck. This is the set?
I like it.