Hi Aslain,
since techtree was reworked (during last bigger update) I'm missing "mastery badge" (3-2-1-M) symbol over techtree tank icons.
I tried some of techtree options in your available modpack (incl. your one) shows mastery badge symbol on preview pictures (so it would be there), but unfortunately I can't see it....
(BTW: for example garage "carousel" tank icons shows mastery badges correctly)
Is this functionality obsolete/abandoned since techtee rework ? Or is it bug ? Or there is some additional maintenance required ? Thx for answer.