That does look amazing, but he should carefully consider submitting to FW. GW's standard policy on submitted artwork, articles, models, photos etc is that the creator surrenders any and all copyright and IP rights wholly to GW in perpetuity (not that this should come as a surprise to anyone). So unless he is looking for a job, I'd think carefully about giving up his rights as designer of the model. (Though as some of it is GW parts they probably already have some copyright ownership.)