The entire assembly in now baked in with the new ceramic insulator. 500W? No problem! Comes in Regular with the usual bottom solder hole, Bottom Feeder with Japanese stainless steel, and a 35A max (0.125ohms @ 4.2V / (0.250 ohms @ 8.4V) Mechanical version.
Can the Mechanicals take a lower resistance build. Yes but it is not advisable ‘coz your 510 will heat up. Not break or melt – just heat up.
BF model comes with washer spacer and a positive solder shaft.