Mine have allen key type grub screws instead of an extra (locking) nut
Actually means with the weight off the wheels I can adjust without spanners, though they can be had from most decent tool suppliers pretty cheap anyway
Interesting to here other dont have the same drama with front springs being untrapped at full droop though and with the helpers my rears are totally trapped no drama at all??? Are you measuring the helpers without any load on will measure mine up an when I get back into town an let u know how long they are if it helps.
Can you tell fron the part numbers on the springs the rate ????