sprag clutch replacement

[alan s4]

Finally decided to sort out the iffy starting from cold with the S4. Over the years I've changed the following:

Starter and Earth Cables
Reg/Rect
Batteries x 3
New Starter Motor
New Solenoid

The sprag clutch is getting worse, especially when cold, so it's time to get it sorted. I've had the cases off before when changing the starter motor so I'm happy with that side of the job.

My only real concern is removing the Flywheel nut. I don't have an air gun/rattle gun or a flywheel holding tool. I've watched a couple of vids where they use a bolt to lock the flywheel, any other recommendations?

From the diagram, I'm going to order item 21 (one way clutch), 20 (the driven gear) and 17 (thrust washer). I've seen some replacing the flange (13) however not sure whether this is really required? Looking at circa £200 in parts

Any other hints and tips while I'm at it?

Cheers

Alan