So, I have my new shotgun, and if I have interpreted the serial number correctly, it's made in -78. At any rate, it does not have the flex-tab parts on it.
What I've quickly read from on-line and the Kuhnhausen manual, the flex-tab manual was developed to address a jamming issue that surfaced in older, worn guns used by inexperienced shooters. I guess I am not in the position to accurately judge my own shooting skill, however my gun appears to be basically brand spanking new. (The previous owner was a gun collector.)
My question is, how important is it in actual practice to have the flex-tab modification made to this gun, in order to ensure reliability? (I am guessing there is no way to buy the parts, so I'd have to have a gun smith modify the existing parts. Considering the skill level of some of the local "gun smiths", this makes me uneasy at the thought...)