Xulfiqar...
The way you work impresses me! (Bravo!!)
One must really be able to pause and think, to appreciate the minute details, which in the end matter!
Anyways, in the desi way, when the sleeve is pressed into the cylinder, do you have figures that by what factor it is actually oversized...
Pakistani technicians are very bad at detailing...
During my research a long time back, I remember reading somewhere that alloy based sleeves are used (instead of cast iron) for aircooled motors, due to their conduction properties...and this may also be another vital key to longevity, ofcourse after having pressed in the sleeve in the manner you have shared!