I just saw you'd posted the link to that sites copper rods,but their smallest diameter is 10 mm which is way too thick for replacing the central pin on an Ego/510 adaptor.As I said,I'll wait until I get a mech mod to play with before I decide to hunt a LOCAL (as in,within the town) supply of copper rod.This town is dying so quickly though,chances are high that I'll need buy it online,or visit the motor factors just up the road & buy a length of copper brake-pipe(tubular,very small OD & easily worked with barely any fecking tools as daughter/daughters friends have been in my shed & nothing is where its supposed to be,though its box is still there)