Thanks both… really appreciate you looking at this.
it seems that it’s still bugging out.
Started a fresh project. Brought in the original MH… and then the custom head.
I’ve checked the LOD synch… the grooms have support it seems for LOD 2 and above… and also tried reattaching the groom in the level.
Still it vanishes… No trace of it anywhere in the scene.
Can only guess it’s a bug at this stage… after watching an earlier tutorial on this workflow… and their groom attaches without any problems.