VonGruff is right, IMO. Meticulous fitting of steel to wood to achieve a skin-tight fit is the mark of craftsmanship, and a source of pride. A lot of people view epoxy bedding as a panacea for all that ails them, and an excuse to avoid careful inletting. If the wood is stable, and a truly nigh perfect job of work is done with the inletting, adding epoxy is superfluous. Best save it for the first coat of finish on the exterior of the stock.
Of course, mistakes can be made. Eveybody makes mistakes. Nobody will fault you for using thickened epoxy (so called "glass bedding") to fill an unintended internal void, or to go ahead with bedding it if after completion if it doesn't suit you for whatever reason. At least try to inlet it as close as you can initially. Work slow- patience is a virtue.
