I have started the project. Some things I have noticed so far:
The handle material is hard, harder than I thought. So far I have removed about 4 millimetres of material with much work. I have sanded enough to remove the "crosses" up to the point there is only a pattern visible on the surface. To get the handles smooth requires more work.
The handle scales are thicker than I thought so removing the cross pattern will not reduce the strenght much, because the raised crosses do not give any strenght to the material, since they are only an overlay. This knife is also, for the price, surpricingly well made and tolerances are thight. I put the knife back together for a while and I left the pivot bolt quite loose. Still there is no blade play. I am pleasantly surprised.
I also touched up the edge by stropping it against a slab of heavy leather I have glued on a piece of plank. Whoa baby! This thing got even sharper, scary sharp. Which, after some slight wounds, reminded me to tape the edge before continuing the work.