@ R1NGA
I now have the Empire kit set without the risers (track rods pointing slightly downward). The difference with standard setup is lighter steering (but went from toe out to neutral so this could be part of the explanation). Still have some kick back on big bumps but overall already 70% better with camber and caster not balanced on both wheels. Just shows that the initial geometry must have been of the lawnmower type as someone suggested.
Will be able to comment on full setup a little later.
Has anyone done a full geometry including rear wheel using laser or similar?
Have used measure tape and level up to now.