I apologize in advance if this question has already been asked, but does a unit need to be level 20/20 to get the maxed stat bonuses transferable to RD? I am aware they have to be level 20 in their second tier class, but I haven't been able to find clear information on this site or elsewhere if it matters whether they were level 20 when they promoted, or if they could be something like 10/20 or 15/20.