i have what i believe is an old edgemere mondolin. it is a bowl back shaped body. the tuners are shot the tailpiece is rusted. other wise it appears solid, with a nice fret board. there is a star on the headstock. i really want to get this instr. up and playing. are modern parts ok to use? should there be a makers mark on it somewhere? i think its an edgemere, because i saw the same mando in an old sears catalog.(circa 1908)...and it looks exactly like the picture. any help?