Wow....... this has been a difficult thread for me to digest. Cthulhudarren, I'm afraid your comments separate the real Armourers of the world from enthusiastic amateurs. So you need to sit back, listen and take on board a few words of wisdom. If you repaired your rifle in the same way as the Army repaired and then refinished their rifles, it would be as good and presumably as valuable as it ever was. And how do you know that there aren't a zillion more, repaired exactly like that, out there STILL giving perfect service throughout the world. I'd say that there were. And you wouldn't need a Mk1 or 2 rifle!
As for this ridiculous notion of using a brass washers grease to prevent this that and the other, then I'll say two things...... First, this is not even a palliative and certainly not a cure.... it's STILL defective or wrong and b) It's the bloody bolt head that is jumping out of the broken track and not the striker spring or striker or the cocking piece. How many times do you need telling that the striker spring has no effect whatsoever on the bolt head. Listen.... THE STRIKER SPRING IS TOTALLY SEPARATED from the bolt head and EVEN MORE SO the moment you close and open the bolt. I could go into the technical aspects of this that and the other but feel I'll be wasting my time - much as you will be doing by suggesting what you have
What other doses of reality do you a) want or b) need.......?
PS someone's PM'd me and said I sound a tad frustrated! You're right..... It's like someone has a slight problem, asks for an answer, gets the only correct one from 'the wisdom of the crowd' - and then gives you HIS answer as the definitive answer!