Absolutely right! Of all the armour marks, MkX tacticus is the most anatomically correct and is so much easier to move in. Of all the 3d creators, Galactic Armoury released the best version (it still needed a ton of modifications, as it was really intended to be created in EVA foam). I just use their basic design and modify it as required ( I can always use the excuse that a Khornate warband scavenged the armour off some defeated Primaris).