Without the disc it's in weight... Can run 2 configurations;

Disc, motor, titanium lid = 13.555kg
Hardox front, Hardox top, magnet = 13kg

Just have to decide what configuration to run, depending on who I'm fighting

LS4 also has 4 small magnets... so far i think thats the only other robot using them...although im guessing someone will turn up and suprise us this year with one.