Hello to All,
The is a video here by 'TenMetrePeter' on fixing a crack on the FAS 604 top strap ( quite why it is age protected I do not know ) :
https://www.youtube.com/watch?v=tiF2_rNeWUU
And seal replacement :
https://www.youtube.com/watch?v=TlGQbR0iUAU
Have fun & a good weekend
Best regards
Russ