since it's a fixed blade you can make it as thick as you want & still be comfortable. I bet you could do 1/4" scales on that particular knife.
Now, if you drop the knife on cement the stabilized wood handle will dent more than G10 would, but G10 would still get dinged. If you want to be able to pound on things with the butt of the knife, make the handle scales 1/16" or so shorter so that the tang sticks out a wee bit from the scales at the butt and so when hammering with the butt you will only be striking with metal not with the wood handles.
The main thing about the stabilized wood is not that it can't take hard work, but that if you scuff it up it will be more noticeable than if you scuffed up micarta or G10 b/c the polished wood looks so much nicer than the synthetics & so any damage will stand out more.
That's a good suggestion about trying out the scale-making process first, but I would say just use some soft pine so you get the feel for the process - G10 or micarta are more expensive, harder to work, and you don't want to inhale that dust if you don't need to (and you will inhale some, it's fine and gets everywhere, expect black snot).
One step I forgot to add is that when you take the slabs off to shape them, connect them together with pins/rod through the holes you drilled, and that way you can make sure that both scales will be exactly the same shape.
Also I should clarify when I say "shape" I mean the two-dimensional shaping of the scales to fit the tang. When I say "contour" I mean doing the 3-dimensional shaping of the scales on all areas except the side that is attached to the tang, in order to make the handles more rounded/comfortable.