Ive been using 510 attys from that devil company for quite some time, and decided to order some from another site. they seem to dry burn alot and i noticed that the bridge looks taller than the my originals, also the metal inside looks different. I think maybe the tall bridge is pushing my filler in deeper and losing contact, i dont know why it would? unfortionatly cant remmember where i got them from, very displeased with losing $26-28 .Please help, thank you, Mo.