Well, I'm going to be honest. Its not meant to be mean but hopefully help you in making a good start even better. While I'm new to 1/16 RC Tanks, I'm not new to R/C or scale model armor. I've built many 1/35 scale tanks which included heavy modifications.

The weathering job is so-so....

Your dry-brushed areas looks too random. Unnaturally so. Not sure if aren't taking enough paint off or you aren't overlapping the drybushing enough or doing enough area. But it looks drybrushed. I think you need to take more paint off your brush and make it more even and consistent across the tank. You can clearly see the direction you were drybrushing. You shouldn't be able to see this.

Its also too heavy in some of "high wear" areas like corners where you'd expect to see faded paint or metal. It should be less....

I would also suggest you try an overall wash that will blend and soften your camo a bit. Then use a slightly darker color sepia-ish to highlight all the small details and sit in the zimmerit. Then drybrush the "high" areas. There are some good reference material from this tank thread that shows some really good techniques for weathering.

I suggest also either painting on your numbers or making sure the surface you are applying the decals to has a satin finish or a finish that the decal will adhere to without silvering. After that you can weather more.

I commend you on your attempt at adding some "mud" but this brings awhole different and complex technique. Its a huge task to make it look convincing and not just randomly applied. Although I can't see your roadwheels, They would have some mud on them as well as various place on the tank that would normally get splashed when running in those type of conditions....

I do think your spare tank treads are nicely done. I like the rust......

Again, I'm not flaming, but giving you my honest and hopefully helpful opinion...