@Sophrus well it really depends partially on who The arch traitor is. One of the more charismatic Primarchs might turn more, or less, or who lnows? It really depends on who our archive traitor is and how he plays it
Also, is it to late to switch out his personal weapons? I realize now dual powerfists with with twin linked stormbolters is a bit to... fists of ultramar esque... may I change them?