Morning bonnar_bloke,
I am somewhat excited to report that there is no wobble on the clutch housing, and that both screws on the shaft were quite loose. I tightened them (how tight should I go?), adjusted the clutch a small amount, started her up and no more knocking! The reel also no longer spins when clutch is disengaged. Very happy indeed - you sir are a champion.
Cheers,
Damian
