Thanks, it is more from an interest point of view; I bid thinking the description was wrong/ambitious. It has cost me £80. I intend to own a ZF39 scoped K98icon at some point. I currently service my Britishicon optics, so even if it is a sunk cost to learn some new internals, that is fine with me. If the service is successful and has no place on a k98, I will see it; if I can't recover it spares are always useful.