So, to my understanding, you contact him to work out a price for his missile, because you aren't using it simply for personal use, therefore you pay a little extra upfront, or cut him in on the profit, because it was his original work for the gauntlet missile, that you will be making money off of. Therefore, you are able to sell your gauntlets for a little more than normal because of the added value, Russ gets more money than he would if he hadn't let you re-cast them, and the buyer gets better value because you cut out the middle man, therefore it is a win-win-win situation.