I like it on paper except for the fact that RBs are at a higher premium being that there are less of them and it leaves you a bit unbalanced. Maybe something a bit more than Nelson at WR or upgrade one of your WRs or even better have him throw in a sleeper RB if he has one?
After Ridley's monster outing maybe you can get more for him. I got Mathews for Ridley and Redman before Ridley's Week 1 game. His value is pretty high right now.
I actually like this trade. Despite his quiet production last week, I still have faith in Nelson (drafted him multiple years in a row now) and Graham is a no brainer. Ridley at some point is going to remember he likes to fumble while Gates is still productive, but injury prone. You do have pretty strong WRs, but is there someone on the waiver wire you could pick up at RB to help balance it out?
I like risks, go for it.
Lineup (starters in Bold) QB - RG3, Romo RB - McCoy, MJD,AP, MJD WR - Nelson, Austin, T.Smith, Wallace TE - Graham, Bennett DST - Lions K - Tucker