Hmm, the professional also has some experience of 'what not to do'. Which can be useful :-)
Thanks for the help. Finished the pins just now - everything is now just 2gm short of the target piston/pin. Hopefully downhill slope now.
Don't think I would want to do that for a job - near a day on end of grinding stones.
Regards
Alan

All done. Down to 1gm tolerance. 40-45 gm removed. Now at the low end of the lightest weight group.
Wife not home at moment - so a good scrub in hot water and into the oven to dry off.
The 'stock' piston/pin is on the right in 2nd pic. I ended up taking a fraction off that piston too so it was in balance with the rest.
Afterburn - thanks for your patience and advice.
Regards
Alan http://forums.pelicanparts.com/uploa...1455651549.jpg
http://forums.pelicanparts.com/uploa...1455651569.jpg

To you professionals, how much, if any, can you remove on the skirt?

I dont know what is "safe" But I have removed more than what looked safe a few times and its all still running .
I am talking Long stroke stuff with high piston speed too.
The long answer is style of pistons as there are some almost skirtless ones to antique ones with all sorts of material.
One has to use their head ,be artsy fartsy , follow contours , deburr everything,
It would be nice to be able to say remove here and here.
It more EZ to say" not here and here" as there are so many styles and applications
There is a thrust side of pistons. (off set pins) there are high loaded areas .