Hi All
I have serviced my own Feinwerkbau 600 and a friends 601 air rifles I have been asked to look at a 603 that a club member is having some trouble with, just wondering, if the extra absorber unit needs to be looked at and serviced and if this unit can caused any problems during service, I understand the adjustment of these units is critical? Has anyone done a service video on this model?

Thanks Jim