When it comes to the issue of "everyone" needing for their alt there is a solution. Write a script that checks all the allowed participants skills. If they have the skill for the schematic Need will highlight if they dont its grayed out. That way those that can immediately use the schematic have first crack. if noone has the immediate skill or chooses greed, then everyone greeds and high number wins. That way if it binds to legacy it is a fair to all transaction.