Suppose you could keep the Cartel hands if you wanted. TC hands are the best. Clarks hands are a reasonable compromise. The only downfall being seconds hand. What I would do is use the Clark hour and minute hands and the Cartel seconds hand.
The HR 5513 dial is in my opinion a better option than the Yuki dial. It's cheaper, has eta dial feet, and the fonts look better to my eye, especially the S in Submariner which has always been a flaw in Yuki's Rolex and Tudor Submariner dials.
If you look close at the examples of these he has on his site, the date windows seem to be in the ETA datewheel position. So, if you were to buy one of these and wanted to replace with a rolex movement you'll need a new dial. Note the "13" looks more eta than rolex to me...
Hands seem to be the toughest part about these Air-King builds. I looked high and low for a set of hands for my 5506 franken and had to settle for a pair of dauphine style
hands:
Not perfect, but they look the part for an older Air-King.