Normally when fitting wood to metal one uses some form of 'spotting' aggent. Something to leave a mark on the wood where the metal parts are touching. The tangs on most levers are so nearly straight sided that if you use a spotting agent it will leave marks until the tang groove is too wide to touch.. I use a stock press to force the metal on the stock and then remove only the wood that was burnished by the metal. Caution- too much pressure will split the wood and ruin the buttstock. Do noy cut away wood, just scrape away the wood burnished or crushed by the installation of the metal. Stop when the stock can be pressed on the tangs with only moderate pressure but must be tapped off with a rubber mallet.. A file (medium cut) with the edges ground safe and paralell is handy to even up the tang notch. After the tangs are inletted the action parts are reinstalled and the wood relieved to allow them clearance in the buttstock and the outside of the stock is filed into line with the metal work. Working the wood down to the metal with the metal installed into the buttstock is by far the best. Of course the metal will need refinishing after the final fitting.
