No... I'm sorry, this is a well intentioned story and art is good, but no...
Anakin being the one to build C3P0 was one of the most "What the hell was the point of THAT?" moments in the prequels. It just seemed painfully contrived (as opposed to most of Lucas plotting which just seems randomly contrived), and for the guy who has done what Vader has done, without remorse, to get mushy about a robot he hasn't seen in 20 years just doesn't begin to work for me as a "touching moment".