i remember a time when it was much more expensive to add a second SA on a weapon. it was something like x10 the gemstones it is now. however that got changed at some point and it was made much more affordable, 224 R gems on R weapon for example. the SA change stone from mentee coins however did not get changed (232 R gems + 15k coins for the stone).
dear juji or sace, i would like to make a bet with you on how many years it will take to initiate the change. i bet on "never".
how about you?