But @LAnton s weight is with his diy 1500g battery? the regular 410wh battery with case weighs 2650g (claimed).
I have a ca. 17kg Levo SL with DH tires and from my calculations with the CEF50/M820/410wh you'll add around 1100g compared to the Levo SL frame+battery+motor. So not sub 18kg unless...