I would make the mud relief holes myself (and I did

). I don't think it is worth buying the Legends stuff just to get this. Kind of expensive. YOu could easily make the four holes on each sprocket by making a template with paper and then "painting" on the hole. Let the paint dry and then drill through it with your dremel tool for your four matching holes. I don't like the mud relief holes provided in the other kits since they are not correct anyway. The holes should be oblong, and not perfectly round, and they are set too far back on the Trumpeter set. Then you have to be sure they fit the Tamiya kit anyway.
Bison 126 has a nice close-up of the conduit Mike Mummey is talking about. My three photos of my recent Tamiya build do not have a close-up of this. But the one close-up (see MY PHOTOS) of the front of the turret shows the subtle effect that can be done with Cast-A-Coat for the non-slip surface. I really like this stuff. I used the DML kit as my guide too. It appears that there are SLIGHT differences in the non-slip surface pattern depending on who and when the real stuff was put down.
Good luck. I'd like to see photos as it progresses.
Bob