Hi Guys,
I hope you,can see from the attached photo, that the hairline crack is in the very bottom part of the skirt, where the piston never gets to.
The best solution is to re-sleeve it no doubt, but down here at the bottom of the African continent, that could be a greater risk than a repair. I have managed to buy a very good condition 2nd hand oversize piston.
I like the idea of drilling a small hole at the top of the crack to stop it propagating, then a bit of prep and brazing should hopefully do the trick from what you guys are saying.
Hopefully the force is with me !!!
Bruce