DEM GOGGLES. Every time RD wears goggles, steampunk is 20% cooler. Really nice job elaborating on Tank's helipack thingy, and as others have said, the hat is an excellent touch. Plus, I assume this was done in some mix of physical media and scanned (that's watercolor in the background at least, right?), and I have huge respect for people who can make good looking art with things like that (I can barely cobble together things using the pen tool that don't make me vomit).
I'm in the herd since August, I've been featured on Equestria Daily (even made banner for them), My Little Brony, I'm creating pony ask blog and since few months I'm spamming your inbox with pony art and you noticed NOW?! Wow