Haven't noticed any hot XT90'S on the 8s rigs yet. TC Konos with TC combo on 4s though..quite warm. Battery too.I never had any 8s setups. Always figured I would def. go to QS8's on an 8s rig, if I did.
I am anal about that. XT90s' on 6s do get warm if I push them hard. Especially my 6s Lim.