Yeah, the original.mortis was 2x
TLAC arms in a "rifleman" style. So the problem is the left arm. For my goliath I used predator
HB sponsors and replaced the
HB with
AC muzzle, but I think you could use these as the basis for a TLHB in a similar way to Elbows
HB arm. You could then potentially cut off the top.of a dreadnought arm and add it on the top if you really want the classic dread arm profile. The sponsors at least get you the symmetrical weapon mounts as a starting point.