My friend,
I would put a big piece of tape on the inside of the blade well , to cover the holes, before you work on spring pin. Then a tiny bit of glue will form like a 'peened' head to hold on to liner. Similar to the heat mashed plastic pins in the black sawcut 300 scales. I would also lightly 'sawcut' the back of the stag to give the glue grip. BUT, don't go to the edge of the stag, just hide them in the center. More glue grip there also. Same with liner but never go to the edge with these "scratches". This is important with bone and smooth stabilized woods. Also always protect the bolsters with blue tape till the last little careful sanding.....clean metal glue surfaces with rubbing alcohol to remove oil.
300