Vally of the ancient - Character change

After succesfully opening/running the demo project on my machine I began experimenting with swapping the main character (echo) out for one of my CC3 characters. Normally this is a simple enough task of retargeting the the anim blueprint but seems like echo has some additional stuff going on. IM getting errors in the blueprint purporting to a different bone hierachy (both are set to humanoid and all animations and montages have retargeted just fine). When playing in editor the animations seems to to work fine on character but there is no keyboard control of main character.

Has anyone else succesfuly swapped out the main character for one of their own?