I have put the Karbadize nartural tan micarta scales on and it does look better and feels different but it does not feel and look like a totally different knife.
I have to give credit to Demko for overall design. The textured grivory scales work great for this thin profile knife and I can't say I like the feel of the thin Karbadize micarta any better when the knife is kept in this thin flat profile.
I am not fond of the looks of the grey and other dull colored grivory scales. The brighter colored scales such as red, jade, and orange do not look bad at all. The black is not too bad either since it is semi gloss. Regardless of color all of the grivory scales are well designed and provide an astoundingly good grip.
The "earth" colored grivory scaled D10 AD20.5 advertised by Knifecenter looks more like olive drab (dull) instead of the brownish mustard pictured and the back spacer has odd contrast to the tan micarta Karbadize scales that do not come with a back spacer.
The extra thickness combined with micarta feel that RGT scales provide is what will make an AD20.5 look and feel like a totally different knife in my opinion.
In contrast the Karbadize scales look better than the stock grivory feel different but not better and leaves the Knife in it's stock thin flat profile which is why you don't wind up with a totally different look and feel that RGT scales provide. I do like my scales to come with a matching back spacer too.
Karbadize scales fit easily and readily screw on. RGT scales are a more precise fit that requires some fiddling to get everything aligned before snapping into place and screwing on.
AD20.5 thumb studs are substantial, well made, fit very well (precise) and are high quality as well as removable if you want easier sharpening and totally unobstructed cutting (function over looks.) Thankfully Demko chose not to red lock tite them. They screw apart if you hold the other end opposite the screw slot in place with a vice grip while you unscrew with a thin flat head screw driver of proper width.