Tanka K98 magazine spring fix

You can use the spring from a disposable lighter , but you may need to snip a couple of coils off it if it s too long ,but it is just as likely to pop out like the original did.
I've repaired 3 now using a spring with a slightly larger diameter and very gently filing out the area where it sits so that it can't pop out again.There is really nothing but the spring tension holding them in place, I hunted around for an appropriate size spring - like the ones in small pairs of pliers or snips