I know you said American locks are hard for you to get a hold of , but I got mine on Amazon and it had 2 spools , 3 serrated , and all serrated key pins <| sep |> I usually pick all units I like , mostly the ones which look good and are also good ingame too , so I use only units I dont like until THE ONE appears and replace it . Then I also use units just if theyre needed to reach certain maps , or to fulfill certain role , like to obtain a support conversation . I also try to have all the roles unlocked , for example on FE 8 obtaining a summoner and a druid , which you can have only one , yet you must sacrifice one of those if you want the supertrainee ewan . and mostly I tend to train all if it is possible even when I will bench the majority .