It is not an easy job, but is a necessary job to keep the transmission working properly. Easier on RHD cars no brake booster on that side.
To adjust loosen off the lock nut, ensuring that the adjusting screw does not undo with it, then tighten the adjuster with a small spanner don't tighten it too tight just nipped up. Then loosen three full turns and lock the adjuster nut. This way the band is set with the right amount of clearance for the shift timing.
This is the way the book says to do it, only they say to tighten to 6.5 ft-lb. I don't think any body could fit a torque wrench in there, so just nip it up.
As every body has said don't back the adjusting screw off more than two turns other wise the band strut can fall off the adjusting screw.
Adjust it now save the transmission.
Harvey.
