OK, today I re-installed the Actuator with the upgraded spring.
Results are excellent!

sits dead on 1 bar and 1.1 bar in the higher gears. Can't wait to get it tuned!

BTW - I fitted a VF34 type today - no dramas. Fits 100% with the smaller turnbuckle.

Just waiting on the evo 10 boys to see if they are also a direct fit.