Hi Rob,
Cracked stocks are quite common with the pre 1640 Huskies, especially those having a beech stock. Beech being harder than walnut, it is more prone to break especially if the wood is very dry. But cracked magazine / trigger web / wall is very common in any sporting Mausers. Most of the time it's a matter of loose action bolts and way too dry wood, though. Beech wood retracts a bit more than walnut creating a little "loose" in the screws and that's why, combined with the harder wood grain, it makes it a very good combo to break. You always can relief a bit the tang, but if there are micro-cracks present, then, it's already alike to break.
I don't suggest removing the action screw steel tubing guide, since it crush-seats (some kind of pillar bedding...) the tang on the trigger guard..
Now, HVA used to install a brass pin in their higher grades of stocks, so it is "standard" to the 3000 series, as an example.
A non-factory "pinned" stock, when it's well done, usually does not lose value on the market. All depends where the pin is, and, how many they put....
But if placed just between the trigger and the magazine, it's OK.
Below is the correct location for a factory brass pin...
