That thing looks awesome, very nice work. It has a very European look to it. Don't know if that's what you were going for or not, but it fits the rifle perfectly.
Its only as hard as you want to make it. I used to pull everything apart, and get anal about every little thing. Now, I just tape off what I dont want paint on, and have at it. You dont have to paint all your mags, unless you want to. One or two are usually fine though.There may be more to this than I had anticipated.